City of Cleveland v. Ohio Bureau of Workers' Comp.

[Cite as Cleveland v. Bur. of Workers' Comp., 2018-Ohio-846.]

Court of Appeals of Ohio
EIGHTH APPELLATE DISTRICT
COUNTY OF CUYAHOGA

JOURNAL ENTRY AND OPINION
No. 105604

CITY OF CLEVELAND, OHIO

PLAINTIFF-APPELLEE

vs.

OHIO BUREAU OF WORKERS’
COMPENSATION, ET AL.

DEFENDANTS-APPELLANTS

JUDGMENT:
AFFIRMED

Civil Appeal from the
Cuyahoga County Court of Common Pleas
Case No. CV-13-809883

BEFORE: E.A. Gallagher, A.J., S. Gallagher, J., and Laster Mays, J.

RELEASED AND JOURNALIZED: March 8, 2018
ATTORNEYS FOR APPELLANT

Michael DeWine
Attorney General of Ohio
BY: James A. Barnes
Assistant Attorney General
150 East Gay Street, 22nd Floor
Columbus, Ohio 43215-3130

BY: Mark E. Mastrangelo
Jeffrey B. Duber
Assistant Attorneys General
615 West Superior Avenue, 11th Floor
Cleveland, Ohio 44113

David H. Wallace
Michael J. Zbiegien, Jr.
Taft Stettinius & Hollister L.L.P.
200 Public Square, Suite 3500
Cleveland, Ohio 44113

David J. Butler
James D. Abrams
Taft Stettinius & Hollister L.L.P.
65 East State Street, Suite 1000
Columbus, Ohio 43215

ATTORNEYS FOR APPELLEE

Maura L. Hughes
Mitchell G. Blair
Alexander Reich
Calfee, Halter & Griswold, L.L.P.
The Calfee Building
1405 East Sixth Street
Cleveland, Ohio 44114-1607

Barbara A. Langhenry
Director of Law
BY: Lisa A. Mack
Assistant Director of Law
City of Cleveland Department of Law
601 Lakeside Avenue, Room 106
Cleveland, Ohio 44114
AMICI CURIAE

Attorney for The Ohio Municipal League

Garry E. Hunter
175 S. Third Street, Suite 510
Columbus, Ohio 43215

Attorneys for Northeast Ohio Law Directors Association

William R. Hanna
R. Todd Hunt
Walter Haverfield L.L.P.
1301 East 9th Street, Suite 3500
Cleveland, Ohio 44114

Attorney for Ohio Mayors Alliance

Chris W. Michael
Ice Miller L.L.P.
250 West Street, Suite 700
Columbus, Ohio 43215

EILEEN A. GALLAGHER, A.J.:

{¶1} Defendant-appellant, the Ohio Bureau of Workers’ Compensation (the “BWC”)

appeals from a judgment of the Cuyahoga County Court of Common Pleas awarding

plaintiff-appellee the city of Cleveland (the “city”) over $4.5 million in restitution on the city’s

claim that it was unlawfully charged excessive workers’ compensation insurance premiums in

order to subsidize overly generous premium discounts given to public employers who

participated in the BWC’s group-rating program. The city’s unjust enrichment claim was

patterned after a similar claim raised by private employers in San Allen v. Buehrer,

2014-Ohio-2071, 11 N.E.3d 739 (8th Dist.).
 {¶2} The BWC asserts that this case is “materially different” from San Allen. It

contends that “threshold legal issues” regarding the court’s subject matter jurisdiction, the city’s

alleged failure to exhaust administrative remedies and several other affirmative defenses

“independently demand dismissal” of the city’s lawsuit and that the equities in this case, unlike

in San Allen, do not entitle the city to restitution. The BWC argues that the trial court erred in

denying its motions to dismiss and for summary judgment and in granting, in part, the city’s

motion for summary judgment on the issue of liability. The BWC further contends that the trial

court erred in precluding the BWC from raising its affirmative defenses at trial and that the trial

court’s restitution award is against the manifest weight of the evidence. For the reasons that

follow, we affirm the trial court’s judgment.

I. Factual Background and Procedural History

A. The BWC’s Rating System

1. The State Insurance Fund

{¶3} The city, a municipal corporation, is a public employer taxing district (“PEC”)

governed by Ohio’s workers’ compensation laws. The administrator of the BWC, with the

approval of its board of directors, sets the premiums employers pay into the state insurance fund

for workers’ compensation coverage each year. Pursuant to R.C. 4123.38, the city is required to

“contribute to the public insurance fund the amount of money determined by the administrator of

workers’ compensation.” The state insurance fund is comprised of two separate funds

administered by the BWC, i.e., a “public fund” consisting of the net premiums (after adjustments

and dividends) contributed by public employers, and a “private fund,” consisting of the net

premiums (after adjustments and dividends) contributed by private employers. R.C. 4123.01(B),
(H), (J); 4123.30. R.C. 4123.30 requires that each fund be “collected, distributed, and its

solvency maintained without regard to or reliance upon the other.”

{¶4} The BWC is designed to operate on a “revenue-neutral” basis. This means that the

BWC seeks to collect from employers participating in Ohio’s workers’ compensation insurance

program only the amount of premiums necessary to cover the BWC’s projected claims costs and

administrative expenses and to maintain a reasonable surplus in the state insurance fund. Each

year the BWC separately estimates for each employer segment, i.e., private employers and public

employers, the costs of claims and expenses expected to be incurred for that segment. Once the

BWC determines the total premiums it needs to collect, the BWC then allocates that sum

amongst the employers participating in the workers’ compensation system. Under Ohio’s

workers’ compensation system, employers are classified into one or more manual classes based

on the type of work in which their employees are engaged and the degree of hazard of the

employer’s operations. After the BWC determines its total premium needs for the policy year

for an employer segment, it distributes the premiums across the manual classes for that segment.

{¶5} There are approximately 3,800 PECs in Ohio. PECs are assigned to one or more of

14 different manual classes based on the type of entity, e.g., city, county or township. The

policy year for PECs participating in Ohio’s workers’ compensation program begins on January 1

and ends on December 31 each calendar year. A PEC can change the plan in which it

participates from one policy year to the next.

2. Base Rating and Experience Rating

{¶6} Employers are either base rated or experience rated under Ohio’s workers’

compensation system. Base rated employers — employers that are too small to be rated on their

own loss and payroll history — are charged workers’ compensation premiums according to the
base rates of the manual class or classes to which they are assigned, i.e., based on the projected

average costs of claims expected to be filed against all employers in the manual class for the

policy year for which rates are being set. For a base-rated employer, no adjustment is made for

the employer’s actual historical loss experience.

{¶7} Employers that are not base rated are experience rated. Under experience rating, an

employer’s past claims experience, adjusted by a credibility factor based on the statistical

reliability of the employer’s experience, is used to determine the employer’s premium.1 With

experience rating, an “experience modification factor” is applied that raises or lowers the

premium from the base rate. Experience-rated employers are either credit-rated or debit-rated

depending on their claims history. An employer whose loss experience is lower than average,

compared with other employers in the same class, will receive a credit and pay a rate lower than

the base rate. An employer whose loss experience is higher than average, compared with other

employers in the same class, will receive a debit and may pay a premium higher than the base

rate.

{¶8} The BWC determines base rates on an annual basis for each manual class by

projecting the future costs of the combined loss experience of all employers in the manual class

based on historical data and applying certain other factors, including a factor for catastrophic

losses, a rate level factor (to reflect the overall statewide rate level), a factor to fund the

operations of the division of safety and hygiene and an off-balance factor. The off-balance

factor adjusts the base rate for the impact that experience rating (including group rating and the

discounts given to group-rated employers under the group-rating program, discussed infra) has

1
Credibility is essentially the weight given to an employer’s experience.
on the overall expected collection of premiums. 2 Before comprehensive rate reforms were

implemented in 2010, the off-balance factor varied from manual class to manual class for PEC

employers.

{¶9} Annual assessments are added to the base rate or the experience-modified base rate,

as applicable, to cover administrative costs of the BWC and Industrial Commission and to fund

certain relief funds for disabled workers (the “assessments”). The assessments are calculated as

a percentage of premium.

{¶10} A base-rated employer’s “pure premium” is calculated by multiplying the

employer’s payroll in each manual class by the base rate for each manual class. An

experience-rated employer’s “pure premium” is calculated by multiplying the employer’s payroll

in each manual class by the experience-modified rate for each manual class. The employer’s

“blended premium” is calculated by adding the assessments and subtracting any discounts earned

by the employer for participating in the BWC’s discount programs. The total of the premiums

assessed for each manual class to which the employer is assigned, plus assessments, less any

rebates or discounts the employer receives based on its participation in various programs offered

by the BWC, is the employer’s total workers’ compensation premium.

3. Retrospective Rating

2
As the court previously explained in San Allen:

The off-balance factor is used to offset a premium shortfall or overage condition in the overall
level of premiums collected from employers due to experience rating (including both individual
experience rating and group rating) and discounts or rebates given to employers participating in the
BWC’s discount programs. Even if there had been no group rating, use of an off-balance factor
would still be necessary to account for discounts given as a result of individual experience rating
and the BWC’s other discount programs.

San Allen, 2014-Ohio-2071, 11 N.E.3d 739, at ¶ 18, fn. 5.
 {¶11} During the time period at issue, the BWC offered a retrospective-rating plan for

individual employers. A “step closer to self insurance,” retrospective rating allows employers

to assume more of the risk themselves in exchange for lower upfront premiums. A

retrospectively rated employer pays a reduced portion of the premium it would have otherwise

paid had it chosen not to participate in the retrospective-rating plan. In exchange, the employer

assumes financial responsibility for the actual paid claim costs incurred for the next ten years,3

up to individual and overall claim limits that the employer selects. Premiums are determined on

an annual basis. A retrospectively rated employer pays an annual “minimum pure premium”

equal to the employer’s experience-modified pure premium multiplied by a “minimum premium

percentage” determined by the claim limits selected by the employer, e.g., payroll times base rate

times experience modifier times minimum premium percentage. The minimum premium

percentage is based on the BWC’s estimates of the cost of insurance risks transferred to the BWC

(i.e., the risk associated with the claim limits selected by the employer) and other administrative

expenses and charges; a lower percentage is applied for employers that assume a greater share of

the risk and a higher percentage is applied for employers who assume less risk. The minimum

premium percentages are periodically adjusted by the BWC. The annual assessments paid by an

employer are the same regardless of whether the employer participates in experience rating or

retrospective rating. An employer’s “minimum retrospective blended premium” is equal to the

minimum retrospective pure premium plus the assessments.

4. The BWC’s Group-rating Program

3
A retrospectively rated employer pays annual billings of the actual paid claims costs (i.e., the medical and indemnity
payments the BWC makes on its employees’ claims) in years one through nine. In the tenth year, the employer pays
the actual paid claims costs for that year plus the value of any remaining reserves on yet unsettled claims.
 {¶12} In 1989, the General Assembly amended R.C. Chapter 4123 to require the BWC to

develop and implement a plan “that groups for rating purposes, employers, and pools the risk of

the employers within the group.” Am.Sub.H.B. No. 222.

{¶13} In response to this mandate, the BWC began offering group-rating plans to

employers. The BWC established a group-rating plan for private employers in the policy year

beginning July 1, 1991 and for public employers in the policy year beginning January 1, 1992.

See Ohio Adm.Code 4123-17-61-4123-17-68. Initially, the BWC implemented only a

prospective group-rating plan. The BWC did not offer a retrospective group-rating plan until

2009 for private employers and 2010 for public employers.

{¶14} Before group rating, employers could qualify for experience rating only on an

individual basis. Group experience rating allowed employers to group together their claims

history and receive experience-related premium discounts similar to larger employers. Group

rating thus enabled employers with good safety records, but who were statistically too small to be

individually experience rated and who would otherwise be base rated or experience rated with

minimal credibility, to group together with other employers to qualify for experience rating. By

combining the experience of all of the members of the group, totaling it up, and treating the

group as a single employer for rating purposes, the group could qualify for premium discounts

based on their combined claims experience. These discounts were, at times, quite significant.

{¶15} Because the BWC operates on a revenue-neutral basis, the loss in premiums

resulting from the discounts provided to employers under the BWC’s group-rating program had

to be redistributed. In other words, the premium obligations for nongroup-rated employers

needed to be increased in order to offset the substantial discounts provided to employers

participating in the group-rating program. As Christopher Carlson, the BWC’s chief actuarial
officer and Elizabeth Bravender, the BWC’s director of actuarial operations, explained, this was

achieved by increasing the off-balance factor used in calculating the base rates for the manual

classes. In short, the BWC determines a target amount of total premiums to be collected for

each manual class, calculates how much experience rating (including group rating) moves the

total away from the target and then uses the off-balance factor to return the total premiums to be

collected back to the target.

{¶16} Increasing the off-balance factor increased the base rate for all employers.

Therefore, employers who were not part of a group (and did not receive the significant discounts

off base rates that group members received), in effect, paid “extra premiums” to make up for the

discounts granted to group-rated employers under the BWC’s group-rating program.

5. Problems with the BWC’s Group-Rating Program

{¶17} The group rating program was flawed from the start. Bravender testified that even

before the BWC’s prospective group rating program went into effect concerns were raised by the

BWC’s actuarial consultants regarding the program’s susceptibility to manipulation by group

sponsors and the potential for premium inequity between group-rated and nongroup-rated

employers as a result of the generous premium discounts provided to group-rated employers

under the program.

{¶18} Equity concerns continued to be raised once the group rating program was

underway. From 1990 through 2009, the BWC commissioned ten independent actuarial studies

to evaluate the BWC’s group rating plans. Each of these studies concluded that, as a result of

the large discounts given to group-rated employers, the BWC’s group rating program was

creating substantial premium inequity between group-rated and nongroup-rated employers, i.e.,

group-rated employers were not paying enough premiums to cover the risk they presented, and
nongroup-rated employers were paying too much in premiums, subsidizing the discounts given to

the group-rated employers. Each of these studies also recommended that changes be made to the

group rating program to correct this inequity.

{¶19} According to Bravender, the early studies commissioned by the BWC focused on

the effect of group rating on private employers and did not specifically address whether premium

inequity existed between group-rated and nongroup-rated PECs.4 In 2004, the BWC’s actuarial

section in conjunction with actuarial consultant Mercer Oliver Wyman conducted an analysis of

the group rating program with respect to both private employers and PECs. According to an

August 2004 report, “[t]he results of the study indicate that the merit rating methodology allows

for too great of credits to employers and that the non-group rated employers are subsidizing the

group rated employers[.]” The report stated that “[t]he off-balance factor that results from the

introduction of the group rating program indicates that the base rates have had to be increased * *

* over the normal rate increases in order to obtain the desired level of overall premiums given the

large credits that were calculated for the groups.” The report further indicated that the total

nongroup PEC employer “premium subsidy” for rating years 1992-2001 (the time period

referenced in the report) was $69,722,959.

{¶20} A 2006 study by Pinnacle Actuarial Resources, Inc. (“Pinnacle”) and a 2009 study

by Deloitte Consulting L.L.P. (“Deloitte”) also specifically analyzed the equity of the group

rating program as applied to PECs. In a December 2006 report, Pinnacle concluded that the

credits that were being issued to both private and public group-rated employers exceeded the

credits they should have received based on their losses: “Similar to the private employers, the

4
Only certain of these studies are part of the appellate record. Accordingly, we are unable to confirm whether all
of the early studies were limited to an analysis of the group rating program as applied to private employers.
public employer – taxing district experience shows that the group rated policies with the lower

experience modification factors have better manual loss ratios than the other insured but the

impact of the experience rating plan is generally too generous resulting in a situation where the

losses are double the premium collected to cover them.” Carlson, who authored the Pinnacle

report,5 testified that the problems with the group-rating program as applied to PECs were not as

“widespread” or “as large in magnitude” as they were with private employers, but that each of the

conclusions reached in the report “would apply to publics as they did to privates,” including that

the size of the credits being given to PECs who participated in group rating were larger than

would have been indicated by their loss experience.

{¶21} Bravender offered similar testimony. She acknowledged that the problem of

nongroup-rated employers subsidizing excessive discounts to group-rated employers existed both

with respect to private employers and PECs, but that the problem was “less severe” on the PEC

side. John Pedrick, the BWC’s chief actuarial officer from July 2007 until June 2011, testified

that, during the time period at issue, nongroup-rated PECs were subsidizing over-sized discounts

given to group-rated public employers through an increased off-balance factor.

{¶22} In its 2009 report, Deloitte concluded that “[t]he current pricing structure” under

the BWC’s rating system “has created substantial inequity in the premiums paid by different

employers,” that the “primary driver of this inequity is the [BWC’s] current approach to group

rating” and that the “performance results of the group rating program indicate a substantial lack

of actuarial soundness with respect to equitable rating.” Deloitte concluded, with respect to the

premiums paid by private employers, that “[t]he results of this analysis indicate a material

5
At the time, Carlson was employed by Pinnacle and was the lead project actuary for the 2006 study of the BWC’s
group-rating program.
inequity from group rating and therefore group rated employers on an overall basis receive

substantially more premium credit than is merited by their experience.” With respect to

premiums paid by PECs, Deloitte indicated: “In general, similar conclusions reached for [private

employers] hold for PEC policies. However, the results are not as strong as there is a

significantly lower policy count in PEC. * * * [I]nequity similar to [private employer] policies

is indicated due to the use of the charged [experience-modification rating] for group rated

policies.”

{¶23} Bravender and Pedrick expressly acknowledged the “inequities” of the BWC’s

group-rating program as related to PECs — albeit to a lesser extent than private employers —

and testified that rate reforms initiated for PECs in 2010 remedied those inequities by lowering

the off-balance factor and standardizing it across the board.

B. The City’s Participation in the Workers’ Compensation System

{¶24} During the time period at issue, the city’s employees fell within two manual classes

— 9431 (“cities”) and 9439 (“public employer emergency service organization”). Most of its

employees were in the 9431 class. Eduardo Romero, the city’s risk manager, testified that the

city evaluated its workers’ compensation insurance options and each year selected a plan that it

believed represented the best value for the city. Through the 2002 policy year, the city was

experience-rated. Beginning in 2003, the city switched to an individual retrospective-rating

plan. Romero testified that the city decided to switch to a retrospective-rating plan because

experience rating was a “Cadillac policy for [w]orkers’ [c]ompensation,” the city felt it could

have greater autonomy over claims management by shifting to a retrospective-rating plan and the

retrospective-rating plan provided cash flow advantages by reducing the city’s “upfront

obligation.” The city was never group rated under the BWC’s group-rating program.
 {¶25} Through 2002, when the city was experience rated, it paid a pure experience-rated

premium to the BWC. Beginning in 2003, when it was retrospectively rated, the city paid a

minimum premium, i.e., an agreed percentage of what would have otherwise been its pure

experience-rated premium, plus assessments and separately paid actual losses incurred for

employee claims up to the agreed limits.

C. Rate Reforms

1. The BWC’s 2010 Group-Rating Rate Reforms

{¶26} With the policy year beginning July 1, 2009, the BWC began making significant

changes to its rating system to set more equitable premium rates for group-rated and

nongroup-rated private employers.

{¶27} A key element of the BWC’s reforms involved the calculation of the off-balance

factor. As then-BWC administrator Marsha Ryan explained when testifying before the Ohio

Senate Insurance Commerce and Labor Committee in October 2009:

The signature achievement of this plan is that the connection between discounts

for group-rated employers and base rates for non-group rated employers has been

severed. This means that non-group employers’ premiums are not inflated to

cover premium shortages caused by the group-experience rating program. By

setting the base rates for all employers independent of the pricing actions in group

experience rating, BWC eliminated any chance of non-group employers bearing

additional costs created by group-rated employers * * * .

{¶28} Instead of calculating separate off-balance factors for each manual class as it had

in the past, the BWC applied a uniform off-balance factor in setting rates for all manual classes.

The BWC made other changes to its rating program as well, including reducing the maximum
credibility to 77 percent and applying a group “break-even factor,” which had the effect of

decreasing the premium discounts received by group-rated employers.

{¶29} These changes took effect beginning in 2010 for PECs (the “2010 rate reforms”).

During an August 2009 BWC actuarial committee meeting, Pedrick explained that “[t]he goal”

of the rate reforms as applied to PECs was “to achieve rate equity by setting the rate structure to

reach the relative rate levels of 1.10 for non-group and 0.70 for group and eliminate the impact of

group discounts on base rates by establishing a uniform off-balance factor for all PEC manual

classes at 1.01.” In 2010, the uniform off-balance factor for PECs was set at 1.01; however, it

was subject to change each year.6

2. 2016 Changes to the BWC’s Retrospective-Rating Plans

{¶30} Unrelated to the group-rating program, in January 2016, the BWC also made

certain changes to its retrospective-rating plans, including increasing the minimum premium

factors and adopting a loss conversion factor, a multiplier, to be applied to retrospective

payments. In 2012, the BWC retained Deloitte to analyze its individual retrospective-rating

plans, including the minimum premium percentages. In a September 2013 report, Deloitte

recommended an “overall minimum premium increase” of 29% for private employers and 23.5%

for PECs participating in the BWC’s individual retrospective-rating plans due to “the apparent

lack of provisions for certain costs in the current minimum premium percentages.” According

to the Deloitte report, “there was no information or rationale as to why the current minimum

percentages do not appear to have appropriate loadings for these costs.”

6
The city admitted that the rate reforms the BWC implemented for PECs beginning in year 2010 resolved the
premium equity problems with the group-rating program and that the city has not experienced any premium
overcharges relating to group rating since 2009.
 {¶31} Carlson indicated that the BWC revised its retrospective-rating factors “on a

periodic basis,” “hopefully, every five years,” but that the minimum premium factors had been

last studied in 2006. Carlson testified that the Deloitte report revealed that the BWC “didn’t

effectively design” its retrospective-rating plans and had been undercharging employers who

participated in its individual retrospective-rating plans for the risk they transferred to the BWC.

He indicated that the “major reason” for this was because the BWC had failed to include the cost

of its health partnership program in either the minimum premiums or the collections on

individual paid losses. He stated that the BWC had also failed to include a provision for loss

development past 120 months, i.e., to reflect the fact that, after the end of the ten-year period

when the BWC collects reserves from the employer, the reserves would continue to escalate.

C. The Litigation

1. The City’s Complaint Against the BWC

{¶32} On June 28, 2013, the city filed suit against the BWC. The city amended its

complaint in December 2013. Asserting “a claim in equity for unjust enrichment” against the

BWC, the city alleged that “[f]or many years,” the BWC had charged the city and other

nongroup-rated PECs “excessive and inequitable workers’ compensation premiums” to fund

overly generous discounts given to group-rated PECs under its group-rating plan, knowingly

undercharging group-rated PECs and knowingly overcharging nongroup-rated PECs for their

respective risk. The city claimed the BWC’s group-rating plan violated former R.C. 4123.29,

4123.34 and 4123.39 and that the BWC had been unjustly enriched by its wrongful collection

and retention of excessive premiums from the city. The city sought (1) a declaration that the

BWC’s group-rating plan violated R.C. 4123.29. 4123.34 and 4123.39, (2) an order requiring the

BWC to disgorge and repay the excessive premiums that had been wrongfully collected and
retained by the BWC, (3) an award of its “return on investment in connection with the excess

premiums” along with pre-judgment and post-judgment interest, costs and attorney fees and (4)

“such other and further relief as [the] Court may deem just.”

2. The BWC’s Motion to Dismiss

{¶33} In February 2014, the BWC filed a motion to dismiss the city’s amended

complaint. The BWC argued that the common pleas court lacked subject matter jurisdiction

over the city’s lawsuit because, despite its characterization of its claim as equitable, the city was

actually seeking “the legal remedy of money damages” which “falls within the exclusive

jurisdiction of the Court of Claims.” The BWC also argued that former R.C. 4123.29 and

4123.34(C) did not apply to the premiums charged the city because they were not among “the

specific statutes governing the BWC’s rate-making for contributions made by public employers”

and that the only statutory provision governing rate-making for public employers that the city

alleged had been violated — R.C. 4123.39 — did not apply because the city did not challenge the

BWC’s manual classification of public employers. The BWC further argued that the city’s

unjust enrichment claim was barred, in whole or in part, by the applicable statute of limitations

and because the city had failed to exhaust its administrative remedies under R.C. 4123.291. The

city opposed the motion.

3. The San Allen Decision

{¶34} While the BWC’s motion to dismiss was pending, this court issued its decision in

San Allen, 2014-Ohio-2071, 11 N.E.3d 739. In San Allen, a class of private, nongroup-rated

employers sued the BWC to recover excessive premiums they had been charged to subsidize

discounts given to group-rated employers under the BWC’s group-rating program from

2001-2008. The class included employers who had been nongroup rated during any of the years
at issue and, therefore, included employers who had been group rated in certain years and

nongroup rated in others. Id. at ¶ 25.

{¶35} The trial court held that the BWC had been unjustly enriched as a result of its

unlawful collection of excessive workers’ compensation premiums from nongroup-rated

employers and that the plaintiffs were entitled to restitution of the amounts by which they had

been overcharged as a result of the BWC’s violation of former R.C. 4123.29 and 4123.34(C).

Id. at ¶ 47. Following a hearing on the final restitution amount, the trial court awarded plaintiffs

$859,440,258.79 in restitution on their unjust enrichment claim. Id. at ¶ 49. This court

affirmed the trial court’s findings that the BWC’s prospective group-rating plan violated former

R.C. 4123.29 and that the BWC had knowingly maintained an inequitable rating system,

resulting in excessive premiums payments by nongroup-rated private employers, in violation of

R.C. 4123.34(C). Id. at ¶ 78-82, 112. However, it reversed and remanded the case for

recalculation of the portion of the restitution award relating to class members who were group

rated during part of the class period, to include an offset for the subsidy benefits those class

members received under the group-rating plan during the years within the class period in which

they were group rated. Id. at ¶ 137.

4. The Trial Court’s Ruling on the BWC’s Motion to Dismiss

{¶36} In June 2014, the trial court denied the BWC’s motion to dismiss, concluding that

it had subject matter jurisdiction over the dispute, that the city was not required to exhaust any

administrative remedies provided for in R.C. 4123.291 before filing suit and that the city “had

succeeded in alleging legal causes of action.” The trial court pointed out that in San Allen this

court had previously determined that former R.C. 4123.29(A)(4)(c) “contained a mandate that the

BWC use a retrospective group rating system” — not a prospective group-rating system — and
that the BWC violated R.C. 4123.34 “by overcharging non-group participants relative to the

risks they posed.” The trial court rejected the BWC’s arguments that R.C. 4123.29 and R.C.

4123.34(C) applied only to private employers and held that if, as the city alleged, the BWC had

“overcharged [the city] as a non-group participant relative to the risk it imposed,” that would

constitute a violation of R.C. 4123.34(C). The trial court also held that the city had “properly

alleged a violation of R.C. 4123.39” and rejected the BWC’s arguments that the city’s unjust

enrichment claim was time-barred.

{¶37} On June 26, 2014, the BWC filed its answer. The BWC denied the material

allegations of the city’s amended complaint and asserted twenty-three “defenses.”7

5. Cross-Motions for Summary Judgment

{¶38} In September 2016, the city and the BWC filed cross-motions for summary

judgment. The BWC argued that it was entitled to summary judgment because (1) the city’s

unjust enrichment claim was barred by the voluntary payment doctrine; (2) the city’s unjust

enrichment claim was time-barred, in whole or in part, by the two-year limitations period set

forth in Ohio Adm.Code 4123-17-17, the five-year limitations period set forth in R.C. 126.301 or

the six-year limitations period set forth in R.C. 2305.07; (3) the city’s unjust enrichment claim

was barred by laches and (4) the premiums paid by the city “were not excessive considering the

totality of the circumstances.”8

7
The BWC’s “defenses” included failure to state a claim for which relief could be granted, lack of jurisdiction,
improper venue, failure to join a necessary party, failure to exhaust administrative remedies, failure to mitigate
damages, lack of standing, waiver, estoppel, release, laches, setoff and recoupment, payment, accord and
satisfaction, “applicable immunities” and the statute of limitations. The BWC also contended that the city’s
amended complaint was barred in whole or in part because: the city is a public employer who is “subject to specific
rate-making statutes,” the amended complaint “seeks the determination of discrete facts,” the city was retrospectively
rated, the BWC did not charge the city excessive premiums, the city’s claim for repayment was not liquidated, the
statutes at issue do not invoke a private right of action and equity favors the BWC.

8
In support of its motion for summary judgment, the BWC attached excerpts from the depositions of Romero,
 {¶39} The city argued that the BWC was collaterally estopped from challenging “key

factual and legal findings” relevant to its claim based on this court’s decision in San Allen, supra.

The city argued that it was entitled to summary judgment because there were “no material issues

of disputed fact” that the BWC’s rating system as applied to the city violated former R.C.

4123.29(A)(4)(c), 4123.34(C) and 4123.39, that the city had been overcharged premiums under

the same group-rating program found to be illegal in San Allen and that the BWC had been

unjustly enriched by the “millions of dollars” it had overcharged the city “to cover excessive

discounts granted to group-rated PECs.” The city also asserted that, based on the undisputed

facts, it was entitled to restitution of $4,524,392 in premium overcharges.9

6. The Parties’ Actuarial Experts

a. The City’s Expert

{¶40} The city retained actuarial consultant Allan Schwartz (“Schwartz”), who was also

the plaintiffs’ expert in San Allen, to support its unjust enrichment claim. Schwartz opined that

the city had been overcharged for its workers’ compensation premiums under the BWC’s rating

system based on (1) actuarial reports that concluded that nongroup-rated employers as a whole

Carlson, Pedrick, the city’s expert, Allan Schwarz, the BWC’s expert, Gary Josephson, and an affidavit from Ronald
Suttles, the BWC’s director of employer programs and business analysis, in which he explained the claims costs paid
by retrospectively rated employers.

9
In support of its motion for summary judgment, the city attached excerpts of the depositions of Bravender and
Carlson taken in this case, excerpts of the depositions of Bravender and Pedrick taken in Parma v. Ohio Bur. of
Workers’ Comp., Cuyahoga C.P. No. CV-13-814017 (the “Parma case”), the trial court’s decision in San Allen, the
trial court’s journal entry denying the BWC’s motion for summary judgment in the Parma case, excerpts from the
BWC’s “Plan for Adequacy and Equity in Ohio’s Group-Experience-Rating Program” (Oct. 26, 2009), reports
relating to studies conducted by the BWC’s independent actuaries of the BWC’s group-rating program in 1993,
1994, 2004, 2006 and 2009, BWC Administrator Marsha Ryan’s testimony before the Senate Insurance Commerce
and Labor Committee regarding group rating and comprehensive review (Oct. 20, 2009), a report on group and
nongroup rate levels presented to the actuarial committee of the BWC’s Board of Directors (Feb. 19, 2009), minutes
from a August 27, 2009 meeting of the actuarial committee of the BWC’s Board of Directors, a Powerpoint
presentation entitled, “Rate Reform for Public Employer-Taxing Districts,” an affidavit from Carlson (from the
Parma case), an affidavit from Romero regarding the city’s participation in the workers’ compensation system and a
declaration from Schwartz setting forth his opinions, analysis and calculations.
had been overcharged as a result of the BWC’s group-rating program and (2) testimony by BWC

representatives, including Bravener, Pedrick and Carlson, that excessive discounts and subsidies

had been given to group-rated PEC employers funded by nongroup-rated PEC employers. He

further opined that the amounts the BWC charged the city were “legally inequitable” and,

therefore, “actuarially inequitable,” based on the BWC’s use of an illegal and inequitable

group-rating program as found in San Allen.

{¶41} Schwartz claimed that from 1997 to 2009, the BWC overcharged the city

$4,524,392 for its workers’ compensation premiums by using an inflated off-balance factor. For

each of the years at issue, Schwartz calculated a rate adjustment factor by comparing the

off-balance factor the BWC had actually used when calculating the city’s premiums to a

“corrected” off-balance factor of 1.01 — the uniform off-balance factor the BWC applied to all

PEC manual classes beginning in policy year 2010 when attempting to eliminate the impact of

group discounts on the base rate. 10 He then subtracted the rate adjustment factor (as a

percentage) from 100 to determine the percentage overcharge. He multiplied the premiums paid

by the city (less the amount of any rebates or dividends received) by the percentage overcharge to

determine the dollar value of the premium overcharges for each of the years at issue. For the

years in which the city participated in retrospective rating, the amount of the “retro billings,” i.e.,

the actual claims costs, was not included in the premium overcharge calculations because it was

not impacted by the base rate and, therefore, was not affected by the inflated off-balance factor.

10
Although the city paid premiums in two manual classes during the time period at issue — 9431 and 9439 — “for
ease of calculation,” Schwartz used only the actual off-balance factor for class 9431 in calculating the amount of
premium overcharges because, according to Schwartz, it had “99.9 percent of the premium in it, or maybe even more
than that.” Schwartz explained that, had he done the calculation for each class separately, the amount of the
overcharge would have been “slightly higher,” because class 9439 had a higher actual off-balance factor. Because
the actual off-balance factor was not available for 1997, Schwartz estimated the actual off-balance factor for that
year as the average of the actual off-balance factors for the next three years.
However, administrative assessments, which were set as a percentage of premium, were included

in the calculation of the premium overcharges for the years for which data was available. 11

Based on Schwartz’s calculations, the annual percentage overcharges during the period 1997 to

2009 ranged from 0.15% in 2009 to 12.22% in 2003. Schwartz testified that his methodology

represented a “reasonable,” “actuarially sound basis” for determining the amount by which the

BWC overcharged the city.

b. The BWC’s Expert

{¶42} The BWC retained actuarial consultant Gary Josephson to (1) evaluate Schwartz’s

opinions and calculations and (2) determine the impact of group rating on the premiums the city

would have paid had the changes to the group-rating program that were implemented in 2010

been in place during the policy years at issue. Josephson claimed that because the off-balance

factor is used to offset the aggregate impact of experience rating and because experience rating

values change from year to year, Schwartz’s use of a single off-balance factor of 1.01 for all

years was “actuarially inappropriate.” Josephson also criticized Schwartz’s failure to take into

account the implementation of a group break-even factor and reduction of maximum credibility.

He claimed that these factors should be considered in calculating the impact of the rate reforms

because a change in credibility or a decrease in the discounts given to group-rated employers

could change the experience rating calculations which, in turn, could affect the off-balance

factor.

{¶43} Josephson offered an “alternative calculation.” Under his alternative calculation,

Josephson estimated that the city would have paid approximately $2.7 million in lower premiums

11
This data was available for 2003 to 2009. The alleged premium overcharges related to assessments constituted
approximately $814,000 of the $4,524,392 total premium overcharges calculated by Schwartz.
had the 2010 rate reforms been in effect from 1997 to 2009. The primary difference between his

calculation and Schwartz’s calculation involved the off-balance factor used in the calculation.

Whereas Schwartz used 1.01 — the uniform off-balance factor adopted by the BWC in 2010 —

in calculating premium overcharges for all years, Josephson recalculated a new, alternative

uniform off-balance factor for each year. Josephson also incorporated the breakeven factor and

credibility limits added in 2010 in his calculation. Josephson testified that he took the BWC’s

premium, payroll and loss data, replaced the credibility factors that had been used, applied the

credibility limit implemented in 2010, added in the group break-even factor, recalculated the

groups’ experience rating factor and then recalculated “what the off-balance was as a result of

that.”

{¶44} Josephson claimed that Schwartz’s analysis did not support the conclusion that the

city had been “overcharged” for its workers’ compensation premiums. Josephson opined that

the $2.7 million premium impact he calculated, i.e., a 2.2% reduction in premiums from the

approximately $120 million in premiums the city actually paid, was “well within the range of

normal variability that exists in the ratemaking process” and that, therefore, “group rating did not

materially impact Cleveland’s premiums.” He further opined that the BWC should not be

required to return any premium payments to the city because it is “not practical” to go back and

repay or recollect premiums for changes that are made in the rating process. He indicated that

just “[b]ecause the methodology is changed or different assumptions are used does not mean the

insuring entity should adjust historical premiums paid by policyholders” and that “[i]nsuring

entities typically do not adjust prior years’ premiums for changes in the ratemaking

methodology.”
 {¶45} Josephson also disputed the suggestion that the city had been “overcharged” for its

workers’ compensation premiums because the city had been charged less than it should have

been charged for its minimum premiums during the years in which it was retrospectively rated.

Josephson testified that had the 2016 changes to the minimum premiums been in effect in

2003-2009, the difference in the city’s minimum premiums would have likely been greater than

the impact of the 2010 rate reforms for that time period.

7. The Trial Court’s Ruling on Summary Judgment

{¶46} On December 22, 2016, the trial court granted the city’s motion for summary

judgment in part and denied it in part. It granted the city’s motion as to liability on its unjust

enrichment claim concluding that, after the city met its initial burden under Civ.R. 56, the BWC

“failed to raise genuine issues of material fact with evidence satisfying the requirements of Civ.

R. 56(E) on the issue of liability, as was its burden.” However, the trial court determined that

there were “questions of material fact * * * as to the amount of restitution owed to Plaintiff.” It

held that the case would proceed to a bench trial “to determine the amount of restitution due to

Plaintiff.” The trial court denied the BWC’s motion for summary judgment.

8. Trial on Restitution

{¶47} In January 2017, the trial court held a bench trial on the amount of restitution due

the city. The city presented testimony from Bravender, Carlson, Pedrick and Schwartz12 and

argued that it should be awarded $4,524,392 in restitution for the premium overcharges it paid to

12
Bravender, Carlson, Schwartz and Josephson testified live at trial. The city also designated deposition testimony
from Bravender, Carlson and Pedrick. The parties entered into a number of pretrial stipulations, including
stipulations as to the net premiums paid by the city (premiums paid less rebates received) from 1997-2009, the
assessments paid by the city from 2003-2009, the off-balance factors applied by the BWC for the two manual classes
at issue during the years 1998-2009 and the uniform off-balance factors applied by the BWC during the years
2010-2015, and also stipulated that each of the parties’ experts was qualified as an expert to testify regarding the
actuarial issues in the case.
fund discounts given to group-rated PECs under the BWC’s group-rating program. The BWC

argued, based primarily on testimony from Josephson, that the city was not entitled to any

restitution on its unjust enrichment claim because there was no credible evidence that the city had

been “impacted to [its] detriment” by group rating. The BWC contended that Schwartz’s

methodology and calculations were deficient and unreliable, that Josephson’s methodology and

calculations were credible and reliable and that the equities favored the BWC because the

minimum premiums the city paid during the years it was retrospectively rated were insufficient to

cover the risk it transferred to the BWC.

{¶48} At the conclusion of the city’s case-in-chief, the BWC moved to dismiss the case

pursuant to Civ.R. 41(B)(2). The BWC argued that the city had failed to prove that it was

entitled to restitution because Schwartz’s methodology was not actuarially reliable. The trial

court denied the motion. At the conclusion of the BWC’s case, the BWC renewed its motion to

dismiss arguing that, considering the weight of the testimony of both experts, the relief sought by

the city was not supported by the evidence in the record. Once again, the court denied the

motion.

{¶49} On February 27, 2016, the trial court issued its decision, awarding the city

$4,524,392 in restitution plus post-judgment interest at the statutory rate.

{¶50} The BWC appealed, raising the following five assignments of error for review:

Assignment of Error No. I: The trial court erred in denying the motion of
Defendant-Appellant Ohio Bureau of Workers’ Compensation (the “Bureau”) to
dismiss the First Amended Complaint of Plaintiff-Appellee City of Cleveland
(“Plaintiff” or Cleveland”).

Assignment of Error No. II: The trial court erred in denying the Bureau’s motion
for summary judgment and in granting in part Cleveland’s motion for summary
judgment.
 Assignment of Error No. III: The trial court erred in granting Cleveland’s motion
in limine regarding the Bureau’s affirmative defenses.

Assignment of Error No. IV: The trial court erred in denying the Bureau’s motion
to dismiss during the trial.

Assignment of Error No. V: The trial court erred in awarding Cleveland more than

$4.5 million.

II. Law and Analysis

{¶51} In its first assignment of error, the BWC contends that the trial court erred in

failing to dismiss the city’s complaint for lack of subject matter jurisdiction and failure to

exhaust administrative remedies. We disagree.

A. Motion to Dismiss

1. Subject Matter Jurisdiction

{¶52} “‘Subject-matter jurisdiction is the power conferred on a court to decide a

particular matter on its merits and render an enforceable judgment over the action.’” ABN

AMRO Mtge. Group, Inc. v. Evans, 8th Dist. Cuyahoga No. 96120, 2011-Ohio-5654, ¶ 5, quoting

Udelson v. Udelson, 8th Dist. Cuyahoga No. 92717, 2009-Ohio-6462. When evaluating subject

matter jurisdiction, we apply a de novo standard of review. Id.

{¶53} The BWC contends that the city’s claim for restitution is actually a claim for

money damages, i.e., a legal remedy over which the court of claims has exclusive jurisdiction.

As such, the BWC argues, the trial court erred as a matter of law in determining that it had

subject matter jurisdiction over the case.

{¶54} The city’s claim in this case is the same claim raised by the plaintiffs in San Allen,

i.e., a claim for unjust enrichment seeking equitable restitution of the amount of workers’

compensation insurance premiums collected by the BWC in excess of the premiums the city
should have been charged. Accordingly, for the same reasons this court concluded that the

common pleas court had subject matter jurisdiction over the plaintiffs’ claims in San Allen, see

San Allen, 2014-Ohio-2071, 11 N.E.3d 739, ¶ 53-61, we find that the common pleas court had

subject matter jurisdiction over the city’s claim here. Accordingly, the trial court did not err in

refusing to dismiss the city’s amended complaint for lack of subject matter jurisdiction.

2. Exhaustion of Administrative Remedies

{¶55} The BWC also contends that the trial court erred as a matter of law in failing to

dismiss the city’s amended complaint for failure to exhaust administrative remedies. The BWC

claims that the city was required to comply with the administrative review process set forth in

R.C. 4123.291 and Adm.Code 4123-14-06 for challenges to “risk premium matters” before

seeking relief in the court of common pleas and that because the city did not “protest” their

premium rates through the administrative process, they are not entitled to judicial relief. The

BWC further argues that exhaustion of administrative remedies is a condition precedent to the

granting of equitable relief and that because the city did not plead, in its amended complaint, that

it exhausted any administrative remedies, the city failed to state a claim upon which relief can be

granted. The BWC’s arguments are meritless.

{¶56} The determination of whether a complaint should be dismissed for failure to

exhaust administrative remedies presents a question of law that we review de novo. Martin v.

Ohio Dept. of Rehab. & Corr., 140 Ohio App.3d 831, 835, 749 N.E.2d 787 (4th Dist.2001). “It is

a ‘long settled rule of judicial administration that no one is entitled to judicial relief for a

supposed * * * injury until the prescribed administrative remedy has been exhausted.’” State ex

rel. Teamsters Local Union No. 436 v. Bd. of Cty. Commrs., 132 Ohio St.3d 47,

2012-Ohio-1861, 969 N.E.2d 224, ¶ 19, quoting Myers v. Bethlehem Shipbuilding Corp., 303
U.S. 41, 50-51, 58 S.Ct. 459, 82 L.Ed. 638 (1938). Thus, a party must generally “exhaust any

administrative remedy that could provide him with the relief he seeks” before seeking judicial

intervention. Driscoll v. Austintown Assocs., 42 Ohio St.2d 263, 273, 328 N.E.2d 395 (1975).

{¶57} Exhaustion of remedies is required to avoid “‘premature interference with agency

processes, so that the agency may function efficiently and so that it may have an opportunity to

correct its own errors, to afford the parties and the courts the benefit of its experience and

expertise, and to compile a record which is adequate for judicial review.’” State ex rel.

Teamsters Local Union No. 436 at ¶ 19, quoting Weinberger v. Salfi, 422 U.S. 749, 765, 95 S.Ct.

2457, 45 L.Ed.2d 522 (1975). Exhaustion of administrative remedies is an affirmative defense,

which the BWC bore the burden of proving. AMM Property Invest., Inc. v. Cleveland, 8th Dist.

Cuyahoga No. 99848, 2014-Ohio-821, ¶ 3; Cleveland Constr., Inc. v. Kent State Univ., 10th Dist.

Franklin No. 09AP-822, 2010-Ohio-2906, ¶ 48.

{¶58} Where an administrative agency has no power to afford the relief sought or an

administrative appeal would otherwise be futile, exhaustion of administrative remedies is not a

prerequisite to seeking judicial relief. State ex rel. Teamsters Local Union No. 436 at ¶ 23-24;

see also Kaufman v. Newburgh Hts., 26 Ohio St.2d 217, 219, 271 N.E.2d 280 (1971) (“‘failure to

exhaust administrative remedies available’ may be a defense * * * only if interposed * * *, and if

a remedy exists which is effectual to afford the relief sought”). In determining futility for

exhaustion of remedies purposes, it does not matter that it may be improbable that the claimant

will receive the requested relief. “‘The focus is on the power of the administrative body to

afford the requested relief, and not on the happenstance of the relief being granted.’” (Emphasis

omitted.) State ex rel. Teamsters Local Union No. 436 at ¶ 24, quoting Nemazee v. Mt. Sinai

Med. Ctr., 56 Ohio St.3d 109, 115, 564 N.E.2d 477 (1990); see also McNally v. Cleveland, 8th
Dist. Cuyahoga No. 92697, 2010-Ohio-512, ¶ 12 (“‘[a] vain act is defined in the context of lack

of authority to grant administrative relief and not in the sense of lack of probability that the

application for administrative relief will be granted’”), quoting Gates Mills Invest. Co. v. Pepper

Pike, 59 Ohio App.2d 155, 167, 392 N.E.2d 1316 (8th Dist.1978).

{¶59} Pursuant to R.C. 4123.291(A), any employer “desiring to file a request, protest, or

petition” regarding certain categories of matters specified in the statute must file such with the

adjudicating committee within 24 months after the administrator sends notice of the

determination that is the subject of the request, protest or petition. Relevant to this case, the

matters that the adjudicating committee has the authority to address includes “[a]ny decision

relating to any other risk premium matter under Chapters 4121., 4123., 4131. of the Revised

Code.” R.C. 4123.291(B)(6); see also Ohio Adm.Code 4123-14-06(F).

{¶60} If an employer does not prevail before the adjudicating committee, the employer

may appeal the decision of the committee to the administrator or the administrator’s designee.

R.C. 4123.291(B); Ohio Adm.Code 4123-14-06(E).

{¶61} Once again, this court’s decision in San Allen controls the result here. As we

explained in San Allen:

[T]his case is materially different from * * * one in which an individual employer
challenges a premium it has been assessed, based on a particular application of the
BWC’s rules, classifications, or calculations. Compare Arth Brass & Aluminum
Castings, Inc. v. Conrad, 104 Ohio St.3d 547, 2004-Ohio-6888, 820 N.E.2d 900;
State ex rel. Cafaro Mgt. Co. v. Kielmeyer, 113 Ohio St. 3d 1, 2007-Ohio-968,
862 N.E.2d 474; State ex rel. RMS of Ohio, Inc. v. Ohio Bur. of Workers’ Comp.,
113 Ohio St.3d 154, 2007-Ohio-1252, 863 N.E.2d 160. In such cases, any
“errors” impacting an individual employer (or even multiple employers) are fully
correctable in the normal course upon administrative review. Because of the
BWC’s expertise in administering its own rules and regulations, it ordinarily
should be given the opportunity to review the application of those rules and
regulations to a particular factual context.
 Plaintiffs’ challenges to their rates, however, do not involve individualized
decisions concerning particular employers’ risk accounts, but rather, a
system-wide challenge to the manner in which premium rates were set by the
BWC and a request for system-wide relief. Although the adjudicating committee
(or, upon further review, the administrator or his [or her] designee) may have had
the authority to make individual, manual premium rate adjustments under certain
circumstances, nothing in the record (or the applicable rule and statute) suggests
that the plaintiff class had an administrative remedy pursuant to which it could
have required the BWC to change the manner in which it set premium rates. See,
e.g., AMM Peric Property Invest., Inc. v. Cleveland, 8th Dist. Cuyahoga No.
99848, 2014-Ohio-821, ¶ 4, 6, 12 (where administrative agency lacks power to
grant relief sought, administrative remedy may be inadequate); Bowen v. New
York, 476 U.S. 467, 484-485, 106 S.Ct. 2022, 90 L. Ed.2d 462 (1986) (exhaustion
of administrative remedies would have been futile and, therefore, was not required
where challenged agency action involved a “systemwide, unrevealed policy” that
was inconsistent with established regulations and did not “depend on the
particular facts of the case before it”); New Mexico Assn. for Retarded Citizens v.
New Mexico, 678 F.2d 847, 851 (10th Cir.1982) (plaintiff class was not required
to exhaust administrative remedies before filing lawsuit where the “gravamen” of
the lawsuit was that “the entire special education service system offered by the
State is infirm” and the remedies offered at the administrative level did not
include “a restructuring of the State’s system” as sought by the class); see also
Espinoza-Gutierrez v. Smith, 94 F.3d 1270, 1273 (9th Cir.1996) (exhaustion of
administrative remedies doctrine did not bar review of a question concerning the
validity of an INS regulation due to conflict with a statute).

San Allen, 2014-Ohio-2071, 11 N.E.3d 739, at ¶ 73-74.

{¶62} As in San Allen, the city’s contention that the BWC charged it excessive worker’s

compensation premiums is based on a system-wide challenge to the manner in which premium

rates were set by the BWC, i.e., that the city was charged unlawful and unfair rates due the

manner in which discounts given to group-rated PECs were funded under the BWC’s

group-rating program. There is nothing in the record in this case to suggest that the adjudicating

committee (or, upon further review, the administrator or his or her designee) had the authority to

address the city’s claim that the BWC’s group-rating program, the method by which the BWC set

premiums as a result of that program and the excessive premiums the city was allegedly charged
as a result of that program, were unlawful. Thus, the BWC did not show that the wrongs alleged

by the city could have been corrected by the administrative review process. Because

adjudication of the lawfulness of the BWC’s rating system and the relief sought by the city were

outside the scope of the administrative review process set forth in R.C. 4123.291, the trial court

committed no error in concluding that the city was not obligated to exhaust administrative

remedies prior to filing its complaint. The BWC’s first assignment of error is overruled.

B. Summary Judgment

{¶63} In its second assignment of error, the BWC contends that the trial court erred in

granting the city’s motion for summary judgment as to liability and denying its own motion for

summary judgment on the city’s unjust enrichment claim.

1. Standard of Review

{¶64} We review summary judgment rulings de novo, applying the same standard as the

trial court. Grafton v. Ohio Edison Co., 77 Ohio St.3d 102, 105, 671 N.E.2d 241 (1996). We

accord no deference to the trial court’s decision and conduct an independent review of the record

to determine whether summary judgment is appropriate.

{¶65} Under Civ.R. 56, summary judgment is appropriate when no genuine issue as to

any material fact exists and, viewing the evidence most strongly in favor of the nonmoving party,

reasonable minds can reach only one conclusion that is adverse to the nonmoving party, entitling

the moving party to judgment as a matter of law.

{¶66} On a motion for summary judgment, the moving party carries an initial burden of

identifying specific facts in the record that demonstrate its entitlement to summary judgment.

Dresher v. Burt, 75 Ohio St.3d 280, 292-293, 662 N.E.2d 264 (1996). If the moving party fails

to meet this burden, summary judgment is not appropriate; if the moving party meets this burden,
the nonmoving party has the reciprocal burden to point to evidence of specific facts in the record

demonstrating the existence of a genuine issue of material fact for trial. Id. at 293. Summary

judgment is appropriate if the nonmoving party fails to meet this burden. Id.

{¶67} “Although courts are cautioned to construe the evidence in favor of the nonmoving

party, summary judgment is not to be discouraged where a non-movant fails to respond with

evidence supporting the essentials of [its] claim.” Mayhew v. Massey, 2017-Ohio-1016, 86

N.E.3d 758, ¶ 11 (7th Dist.), citing Leibreich v. A.J. Refrig., Inc., 67 Ohio St.3d 266, 269, 617

N.E.2d 1068 (1993). Civ.R. 56 must be applied in a manner that balances the right of the

nonmoving party to have a factfinder try claims or defenses that are adequately based in fact with

the right of the moving party to demonstrate, prior to trial, that the claims or defenses have no

factual basis. See, e.g., Mayhew at ¶ 11, citing Byrd v. Smith, 110 Ohio St.3d 24,

2006-Ohio-3455, 850 N.E.2d 47, ¶ 11. In this case, the trial court struck the right balance.

2. The City’s Unjust Enrichment Claim

{¶68} The city brought a claim against the BWC for unjust enrichment. The city

contends that the BWC was unjustly enriched because the BWC charged nongroup-rated PECs,

including the city, excessive workers’ compensation premiums in order to subsidize unwarranted

discounts given to group-rated PECs under its group-rating program in violation of Ohio law.

{¶69} Unjust enrichment occurs where “‘a person has and retains money or benefits

which in justice and in equity belong to another.’” Smith v. Vaughn, 174 Ohio App.3d 473,

2007-Ohio-7061, 882 N.E.2d 941, ¶ 10 (1st Dist.2007), quoting Johnson v. Microsoft Corp., 106

Ohio St.3d 278, 2005-Ohio-4985, 834 N.E.2d 791, ¶ 20; Hummel v. Hummel, 133 Ohio St. 520,

528, 14 N.E.2d 923 (1938). The purpose of an unjust enrichment claim is not to compensate

the plaintiff for loss or damage suffered by the plaintiff, but to enable the plaintiff to recover the
benefit he has conferred on the defendant under circumstances in which it would be unjust to

allow the defendant to retain it. Johnson at ¶ 21, citing Hughes v. Oberholtzer, 162 Ohio St.

330, 335, 123 N.E.2d 393 (1954). Restitution is the remedy provided upon proof of unjust

enrichment “to prevent one from retaining property to which he is not justly entitled.” Keco

Industries, Inc. v. Cincinnati & Suburban Bell Tel. Co., 166 Ohio St. 254, 256, 141 N.E.2d 465

(1957); see also Santos, 101 Ohio St.3d 74, 2004-Ohio-28, 801 N.E.2d 441 at ¶ 11 (“restitution

[is] available as the remedy for an unjust enrichment of one party at the expense of another”),

citing Restatement of the Law, Restitution, Section 9 (1937).

{¶70} To prevail on a claim for unjust enrichment, a plaintiff must prove by a

preponderance of the evidence that: (1) the plaintiff conferred a benefit upon the defendant, (2)

the defendant had knowledge of such benefit and (3) the defendant retained that benefit under

circumstances in which it would be unjust for him to retain that benefit. See, e.g., Patel v.

Krushna SS L.L.C., 8th Dist. Cuyahoga No. 104655, 2018-Ohio-263,¶ 25; Johnson at ¶ 21;

Hambleton v. R.G. Barry Corp., 12 Ohio St.3d 179, 183, 465 N.E.2d 1298 (1984).

{¶71} After reviewing the materials submitted by the parties on summary judgment, the

trial court found that the city had met its initial burden under Civ.R. 56, coming forward with

evidence establishing the absence of any genuine issues of material fact as to the BWC’s liability

on the city’s unjust enrichment claim, but that the BWC had not met its reciprocal burden of

pointing to evidence of specific facts in the record demonstrating the existence of a genuine issue

of material fact on that issue for trial. Following a thorough review of the record, we reach the

same conclusion.

{¶72} Both in opposing the city’s motion for summary judgment and in its own motion

for summary judgment, the BWC focused primarily on its affirmative defenses rather than the
elements of the city’s unjust enrichment claim. Likewise, the BWC’s arguments on appeal are

centered on several affirmative defenses. For this reason, we begin our review of the trial

court’s summary judgment ruling with the BWC’s affirmative defenses.

3. The BWC’s Affirmative Defenses

{¶73} The BWC contends that the trial court erred in failing to consider three of its

affirmative defenses on summary judgment: (1) that Ohio Adm.Code 4123-17-17(C) precludes

the city from recovering any premium overcharges; (2) that the city’s unjust enrichment claim is

barred, in whole or in part, by the statute of limitations set forth in R.C. 126.301 or 2307.05 and

(3) that the city’s unjust enrichment claim is barred by the voluntary payment doctrine.13

a. Applicability of Two-Year Reimbursement Limitation in Ohio Adm.Code

4121-7-17(C)

{¶74} The BWC contends that because the city first brought its alleged premium

overcharges to the BWC’s attention in June 2013 when it filed its complaint and the city admits

that the 2010 rate reforms resolved the issues with its premiums, the trial court should have

granted summary judgment in favor of the BWC based on the “two-year limit on the recovery of

alleged overcharges” in Ohio Adm.Code 4123-17-17(C). We disagree.

{¶75} Ohio Adm.Code 4123-17-17 governs “[a]uditing and adjustment of payroll

reports.” See also State ex rel. Roberds, Inc. v. Conrad, 86 Ohio St.3d 221, 223, 714 N.E.2d

13
The BWC also asserts that it was not collaterally estopped, based on the San Allen decision, from asserting these
affirmative defenses in this case. We need not address the BWC’s collateral estoppel argument because the trial
court expressly stated that it did not rely on collateral estoppel in deciding the city’s motion for summary judgment;
its decision was based on the summary judgment evidence presented by the parties. Likewise, we do not rely on the
doctrine of collateral estoppel in resolving the issues raised in this appeal; we base our decision on the evidence
presented by the parties in this case.
390 (1999). The version of Ohio Adm.Code 4123-17-17(C) in effect at the time the BWC filed

its complaint14 provides, in relevant part:

(C) The bureau shall have the right at all times * * * to inspect, examine or audit
any or all books, records, papers, documents and payroll of * * * employers for
the purpose of verifying the correctness of reports made by employers of wage
expenditures as required by law and rule 4123-17-14 of the Administrative Code.
The bureau shall also have the right to make adjustments as to classifications,
allocation of wage expenditures to classifications, amount of wage expenditures,
premium rates or amount of premium. No adjustments, however, shall be made
in an employer’s account which result in reducing any amount of premium below
the amount of contributions made by the employer to the fund for the periods
involved, except in reference to adjustments for the semi-annual or adjustment
periods ending within twenty-four months immediately prior to the beginning of
the current payroll reporting period. * * * The twenty-four month period shall
be determined by the date when such errors affecting the reports and the premium
are brought to the attention of the bureau by an employer through written
application for adjustment or from the date that the bureau provides written notice
to the employer of the bureau’s intent to inspect, examine, or audit the employer’s
records.

{¶76} The BWC cites State ex rel. Able Temps, Inc. v. Indus. Comm. of Ohio, 66 Ohio

St.3d 22, 607 N.E.2d 450 (1993), State ex rel. Granville Volunteer Fire Dept. v. Indus. Comm. of

14
In its brief, the BWC quotes the current version of Ohio Adm.Code 4121-17-17(C), which reflects amendments
effective July 1, 2015. The current version states:

The bureau shall have the right at all times to inspect, examine or audit any or all books, records,
papers, documents and payroll of an employer for the purpose of verifying the correctness of
reports made by employers as required by law.

(1) The bureau shall have the right to make adjustments as to classifications, allocation of wage
expenditures to classifications, amount of wage expenditures, premium rates or amount of
premium.

(2) Except as provided in rules 4123-17-14 and 4123-17-28 of the Administrative Code,
adjustments in an employer’s account which result in changes to the amount of premium due from
an employer for a policy year shall be limited to the annual or adjustment periods ending within
twenty-four months immediately prior to:

(a) The date when such error affecting the reports and the premium are brought to the attention of
the bureau by an employer through written application for adjustment, or

(b) The date that the bureau provides written notice to the employer of the bureau’s intent to
inspect, examine, or audit the employer’s records.
Ohio, 64 Ohio St.3d 518, 597 N.E.2d 127 (1992), and State ex rel. Harry Wolsky Stair Builder,

Inc. v. Indus. Comm. of Ohio, 58 Ohio St.3d 222, 569 N.E.2d 900 (1990), for the proposition that

“employers cannot recover alleged workers’ compensation premium overcharges that were paid

more than two years before demand for their repayment” pursuant to Ohio Adm.Code

4123-17-17(C). However, this case is distinguishable from those cases. Each of those cases

involved the time period for which premium adjustments could be sought due to a

misclassification of the employer’s business or employees. See Able Temps, 66 Ohio St.3d 22,

607 N.E.2d 450 (where classification was invalidated by Ohio Supreme Court, period for which

temporary employment agencies could obtain reimbursement of overpaid premiums was

governed by two-year limitation in Ohio Adm.Code 4121-7-17(C)15); Granville, 64 Ohio St.3d

518, 597 N.E.2d 127 (where fire department paid workers’ compensation insurance premiums to

the state fund unaware of a statute designated volunteer firefighters as township employees for

purposes of workers’ compensation insurance, Ohio Adm.Code 4121-7-17(C)’s two-year

limitation on reimbursement prohibited reimbursement of premiums beyond two years prior to

the date that the classification error was brought to the attention of the BWC); Harry Wolsky, 58

Ohio St.3d 222, 569 N.E.2d 900 (two-year limitation in Ohio Adm.Code 4121-7-17(C) applied

where employer sought a refund for premium overpayments after the BWC erroneously assigned

the employer to a manual class with a higher risk classification with higher premium rates).

That is not the situation here.

{¶77} Based on its plain language, Ohio Adm.Code 4123-17-17 does not preclude or

limit the relief requested in this case. Although Ohio Adm.Code 4123-17-17(C) places a

two-year limit on premium “adjustments” covered by the regulation, this limitation applies only

15
Ohio Adm.Code 4121-7-17(C) was the predecessor to Ohio Adm.Code 4123-17-17(C).
to adjustments related to “errors affecting the [payroll] reports and the premium.” See also State

ex rel. Aaron’s, Inc. v. Ohio Bur. of Workers’ Comp., 148 Ohio St.3d 34, 2016-Ohio-5011, 68

N.E.3d 757, ¶ 22 (“[t]he purpose of retroactive adjustment is to correct an error or mistake”).

The city is not seeking an “adjustment” to its premiums due to any “error” relating to or affecting

its payroll reports. The premium overcharges for which the city seeks restitution in this case

were the result of an alleged deliberate policy decision by the BWC to charge excessive

premiums to nongroup-rated PECs in order to subsidize unlawful discounts given to group-rated

PECs under its group-rating program. As such, the two-year limitation on premium adjustments

set forth in Ohio Adm.Code 4123-17-17(C) does not apply.

b. Applicability of the Five-year Statute of Limitations in R.C. 126.301 and the
Six-Year Statute of Limitations in R.C. 2305.07

{¶78} The BWC also argues that, based on the five-year statute of limitations set forth in

R.C. 126.301 or the six-year statute of limitations set forth in R.C. 2305.07, the trial court erred

by denying its motion for summary judgment as to any claim for premiums paid before June 28,

2008 (applying the five-year statute of limitations) or June 28, 2007 (applying the six-year statute

of limitations). Once again, we disagree.

{¶79} R.C. 2305.07 provides: “Except as provided in sections 126.301 and 1302.98 of

the Revised Code, an action upon a contract not in writing, express or implied, or upon a liability

created by statute other than a forfeiture or penalty, shall be brought within six years after the

cause thereof accrued.” R.C. 126.301 provides: “Except for unclaimed funds under Chapter

169. of the Revised Code, an action against the state or an agency thereof for failure to make any

distribution or other payment shall be brought within five years after the cause of action has

accrued.”
 {¶80} The BWC argues that because this case is “an action against the state or an agency

thereof,” the five-year statute of limitations set forth in R.C. 126.301 governs the city’s claim.

The BWC cites no authority beyond R.C. 126.301 for this proposition. By its terms, however,

R.C. 126.301 applies only to actions against the state or a state agency “for failure to make any

distribution or other payment.” This case does not involve the BWC’s “failure to make any

distribution or other payment” due the city. Rather, the city seeks the return of specific funds

wrongfully collected by the state under its unlawful group-rating program. Accordingly, R.C.

126.301 does not apply.

{¶81} Alternatively, the BWC argues that the city’s claim is “an action * * * upon a

liability created by statute” governed by the six-year statute of limitations in R.C. 2305.07.

{¶82} The city’s claim in this case is a claim for unjust enrichment. A six-year statute of

limitations applies to claims for unjust enrichment. See, e.g., State ex rel. Cty. of Cuyahoga v.

Jones Lang Lasalle Great Lakes Co., 8th Dist. Cuyahoga No. 104157, 2017-Ohio-7727, ¶ 118,

citing Hambleton, 12 Ohio St.3d at 182, 465 N.E.2d 1298; Pomeroy v. Schwartz, 8th Dist.

Cuyahoga No. 99638, 2013-Ohio-4920, ¶ 41. “‘[A] claim for unjust enrichment accrues on the

date that money is retained under circumstances that make it unjust to do so.’” Pomeroy at ¶

41, quoting Palm Beach Co. v. Dun & Bradstreet, 106 Ohio App.3d 167, 175, 665 N.E.2d 718

(1st Dist.1995). The discovery rule has not been extended to unjust enrichment claims. Jones

Lang at ¶ 118; Drozeck v. Lawyers Title Ins. Corp., 140 Ohio App.3d 816, 749 N.E.2d 775 (8th

Dist.2001); see also Marok v. Ohio State Univ., 10th Dist. Franklin No. 13AP-12,

2014-Ohio-1184, ¶ 25.

{¶83} Citing Zion Nursing Home, Inc. v. Creasy, 6 Ohio St.3d 221, 224, 452 N.E.2d 1272

(1983), and several other “periodic payment” cases, the BWC contends that each of the city’s
workers’ compensation premium payments has “its own statute of limitations” and that,

therefore, the six-year statute of limitations bars the city from obtaining restitution of any

premiums paid prior to June 28, 2007. None of those cases involves an unjust enrichment

claim.

{¶84} We find this court’s prior decision in Pomeroy instructive in determining when the

city’s unjust enrichment claim accrued in this case. In Pomeroy, an insurance agent and his

insurance agency (collectively, the “agent”) brought an action against a commercial client and its

president (collectively, the “client”) to recover funds the agent advanced to the client to pay

non-covered “trail claims,” after the client failed to purchase “trail claims coverage” when it

switched health insurance plans from a self-insured plan to a fully insured plan in November

2002. Pomeroy, 2013-Ohio-4920, at ¶ 5-7. To avoid losing the client, from February 2003 to

September 2003, the agent paid a number of the unpaid “trail claims” himself. Id. at ¶ 8. The

relationship between the client and insurance agent deteriorated and, in April 2006, the agent

demanded that the client reimburse him for the “trail claims” payments he had made in 2003.

Id. at ¶ 11-13. In November 2011, eight years after he made the last “trail claims” payment, the

agent sued the client, asserting various claims, including a claim for unjust enrichment, based on

his “trail claims” payments. Id. at ¶ 16. The trial court granted summary judgment in favor of

the client on the agent’s unjust enrichment claim. The trial court found that the unjust

enrichment claim accrued in September 2003, when the last “trail claims” payment was made —

rather than the date repayment was first demanded — and was, therefore, time barred under the

applicable six-year statute of limitations. Id. at ¶ 17, 41-42. This court agreed. The court

explained: “This is the date the last of the benefit that was allegedly (1) conferred to [the
defendant], (2) with [the defendant’s] knowledge, and (3) was retained, under circumstances

where it would be unjust without payment.” Id. at ¶ 42, 45-46.

{¶85} The court noted its decision was consistent with a decision by the First District in

Palm Beach. Id. at ¶ 44-45. In Palm Beach, the plaintiff had paid the defendant for credit

information from 1979 to 1982, relying on the defendant’s assurances that it would sell it only so

much credit information as it could use. In 1989, the plaintiff learned that it had paid for more

units of credit information in 1979-1982 than it had used. Palm Beach, 106 Ohio App.3d at

169-170, 665 N.E.2d 718. Four years later, the plaintiff filed suit against the defendant,

asserting various claims, including a claim for unjust enrichment seeking restitution of the excess

payments. Id. at 170. The trial court found that the plaintiff’s unjust enrichment claim

accrued in 1982, i.e., when the last of the allegedly excessive charges was paid and was,

therefore, time-barred. Id. The First District affirmed the trial court’s judgment, concluding

that the plaintiff’s unjust enrichment claim accrued “at the latest * * * in 1982 when the last of

the alleged overcharges, or false billings or accountings, occurred.” Id. at 175.

{¶86} The Ninth District reached a similar conclusion in Desai v. Franklin, 177 Ohio

App.3d 679, 2008-Ohio-3957, 895 N.E.2d 875 (9th Dist.). In Desai, the plaintiff and defendant

were business partners. The plaintiff resigned in 2000 and filed suit against the defendant in

2002, alleging that the defendant was unjustly enriched because he had underpaid the plaintiff for

many years. Id. at ¶ 2-5. At trial, a jury awarded the plaintiff $301,597.34, which covered

payments the defendant failed to make to the plaintiff from 1987 to 2000. Id. at ¶ 8. On

appeal, the defendant argued that the plaintiff could only recover the payments due for the six

years preceding the 2002 filing of the complaint and that the jury’s award should, therefore, be

reduced to $128,705.67. Id. at ¶ 11, 13.
 {¶87} The Ninth District disagreed and held that the plaintiff’s entire unjust enrichment

claim, i.e., for payments dating back to 1987, did not accrue until the last point in time that the

plaintiff conferred a benefit on the defendant, which was in 2000 when the plaintiff resigned.

Id. at ¶ 23.

{¶88} In Bank of Am., N.A. v. Darkadakis, 2016-Ohio-7694, 76 N.E.3d 577 (7th Dist.), a

homeowner claimed that the bank lacked standing to bring a foreclosure action because he did

not sign the note or mortgage, notwithstanding the fact that he had initialed every page of the

mortgage and the mortgage was used to pay off a prior note and mortgage for which he was

liable. Id. at ¶ 2-7. The bank brought an unjust enrichment claim against the homeowner,

which the homeowner asserted was time-barred. Id. at ¶ 6. The trial court granted summary

judgment in favor of the bank and entered a decree of foreclosure. The home owner appealed.

Id. at ¶ 8-12. Among the issues raised on appeal was the statute of limitations on the bank’s

unjust enrichment claim. The homeowner claimed that the statute of limitations began to run in

September 2004 when the bank’s mortgage was used to pay off the homeowner’s prior mortgage.

Id. at ¶ 41. The Seventh District disagreed. It indicated that because payments were made on

the note from 2004 to 2012, the bank’s unjust enrichment claim could not have accrued until

those payments stopped. The court explained:

This reasoning * * * fails to acknowledge payments made on the September 4,
2004 note secured by the mortgage. It may be unjust to hold the accrual date as
September 4, 2004, because it would allow [the homeowner] to unilaterally
control the statutory time. See Pomeroy, 2013-Ohio-4920 at ¶ 46. [The
homeowner] could ensure the mortgage was paid for six years and then stop
payment but retain the benefit of having his previous mortgage paid off and
getting to keep his house free and clear of debt. * * * The benefit was being
conferred and retained as long as payments on the note were made. Conference
and retention of the benefit would not cease until [the homeowner] was in default
on the note. Thus, the cause of action may not accrue until payments were no
 longer made on the note. The trial court found the note went into default in
February 2012.

Id. at ¶ 50-51. The court ultimately held that the statute of limitations on the bank’s unjust

enrichment claim did not accrue until June 2012 when the bank filed its foreclosure action

because that was when the homeowner first asserted his claim that the bank could not foreclose

on his interest in the property. Id. at ¶ 52-53.

{¶89} In each of these cases, where one party conferred benefits on another, with the

other’s knowledge, over a period of time, the courts did not regard each benefit conferred as

giving rise to a separate cause of action with a separate statute of limitations. Rather, the courts

looked at the entire period of time over which the party conferred benefits as giving rise to a

single claim for unjust enrichment, subject to a single statute of limitations that accrued when the

last benefit was conferred that unjustly enriched the defendant.

{¶90} Accordingly, we conclude that the city’s cause of action for unjust enrichment did

not accrue until the city made its last premium “overpayment,” i.e., its last premium payment for

policy year 2009, which was the last point in time the BWC allegedly unjustly received a benefit

from the city. We believe that such a rule is more consistent with the equitable nature of an

unjust enrichment claim than the “payment-by-payment” approach to the statute of limitations

advocated for by the BWC.16 Because, the city’s 2013 complaint was within the six-year

16
This is also more consistent with the manner in which the court determined equitable relief should be awarded in
the San Allen case. Although there was no statute of limitations issue in that case, this court held that it was not
appropriate for the trial court to consider the plaintiffs’ unjust enrichment claim on a policy-year-by-policy basis (or
a payment-by-payment basis) and simply award the plaintiffs the sum of the premium overcharges class members
received during each year within the class period in which the class members were nongroup rated. Rather, this
court held that it was necessary for the trial court to consider the class period as a whole and include an offset for the
subsidy benefits class members who were group rated during part of the class period received during the years within
the class period in which they were group rated.
limitations period applicable to unjust enrichment claims, the trial court did not err in concluding

that the city’s claim was not time-barred, in whole or in part, under R.C. 126.301 or 2307.05.

c. Voluntary Payment Doctrine

{¶91} The BWC also contends that the city’s unjust enrichment claim is barred by the

voluntary payment doctrine. The voluntary payment doctrine provides that “[i]n the absence

of fraud, duress, compulsion or mistake of fact, money, voluntarily paid by one person to another

on a claim of right to such payment cannot be recovered merely because the person who made

the payment mistook the law as to his liability to pay.” State ex rel. Dickman v. Defenbacher,

151 Ohio St. 391, 395, 86 N.E. 2d 5 (1949); Consol. Mgmt. v. Handee Marts, 109 Ohio App.3d

185, 189, 671 N.E.2d 1304 (8th Dist.1996); Meeker R&D, Inc. v. Evenflo Co., 2016-Ohio-2688,

52 N.E.3d 1207, ¶ 75 (11th Dist.); see also Culberson Transp. Serv. Inc. v. John Alden Life Ins.

Co., 10th Dist. Franklin No. 96 APE11-1501, 1997 Ohio App. LEXIS 2854, *18 (June 30, 1997)

(“[w]hen a party with knowledge of the facts, but without legal liability to do so, pays money

voluntarily, that person has no claim to recovery for the monies so paid”), A mistake of law

occurs when a person, having full knowledge of the facts, reaches an erroneous conclusion

regarding their legal effect. “It is a mistaken opinion or inference, arising from an imperfect or

incorrect exercise of judgment on facts as they are real.” Consol. Mgmt. at 189; see also Sheet

Metal Workers Local 98 v. Whitehurst, 5th Dist. Knox No. 03 CA 29, 2004-Ohio-191, ¶ 33

(defining a mistake of law as “‘a mistake of a person who knows the facts of the case but is

ignorant of their legal consequence’”), quoting 69 Ohio Jurisprudence 3d, Mistake, Section 9, at

13-14 (1986). A mistake of fact is a “mistaken supposition of the existence of a specific fact.”

Sheet Metal Workers Local 98 at ¶ 34; see also Meeker R&D at ¶ 63-64 (defining mistake of fact

as “‘a mistake not caused by the neglect of a legal dutyon the part of the person making the
mistake, and consisting in (1) an unconscious ignorance or forgetfulness of a fact, past or present,

material to the contract; or (2) belief in the present existence of a thing or material to the contract

which does not exist, or in the past existence of such thing which has not existed’”), quoting

Black’s Law Dictionary (5th Ed.).

{¶92} The BWC contends that there is no genuine issue of material fact that the

voluntary payment doctrine bars the city’s unjust enrichment claim because (1) the city did not

allege any fraud, duress, compulsion or mistake of fact in its amended complaint and (2) the city

“knowingly paid any allegedly ‘excess premiums.’” The city contends that the voluntary

payment doctrine does not apply because (1) the evidence shows that it lacked the “specific

knowledge” necessary for application of the doctrine and (2) its premium payments were not

“voluntary” because they were “compelled by law” and because the city’s workers’ compensation

coverage would have immediately lapsed and the city would have been responsible for payment

of all claims made during the lapsed period as well as fines, penalties (and possibly liens)

assessed against it by the BWC. We do not decide whether the other requirements of the

voluntary payment doctrine have been met because, based on a thorough review of the record, we

find no evidence that the city made any of the premium payments at issue with full knowledge of

the relevant facts.

{¶93} The BWC’s claim that the city “knowingly paid any allegedly ‘excess premiums’”

is based on the testimony of Eduardo Romero, the city’s risk manager. Romero began working

for the city in 2002. Prior to working for the city, Romero worked for the BWC. Romero

testified that when he worked for the BWC he became aware of “BWC studies, actuarial studies”

that showed that nongroup-rated employers were subsidizing group-rated employers who were

receiving a “humongous discount” and that this was “internal knowledge within the [BWC].”
He testified that he “first became aware of the possibility that these rate differences were creating

problems for nongroup-rated employers” in the late 1990s. He explained:

Q. And do you recall precisely how you became aware?

A. I became aware in the ‘90s from internal discussions that I overheard other people
talking about. * * *

Q. * * * Did you understand at the time what the cause of these alleged
subsidies was?

A. My understanding was that [the] BWC, in reaction to these formulation of
groups, employer groups, in order to get superior discounts to their
premiums, were being offset, they were encouraging the formulations of
these groups in order to lower the actual costs of Workers’ Compensation
for a select group of people.

{¶94} He further testified that the “humongous discounts and subsidies” became public

knowledge in the early 2000s and that he “remember[ed] reading about it in the media” at that

time. Romero testified that he had no “firsthand knowledge” of the impact that group rating had

on the city or the basis for the assertion that nongroup-rated employers were subsidizing

group-rated employers. He further testified that he had no “specific discussions” with anyone

about these alleged subsidies while he worked at the BWC.

{¶95} Even assuming the knowledge Romero acquired while he was an employee of the

BWC could be properly imputed to the city, the BWC presented no evidence that Romero knew

that the problems that were being reported in the early 2000s related to nongroup-rated PEC

employers like the city. Bravender and Carlson testified that the early studies commissioned by

the BWC focused on the effect of group rating on private employers and that it was not until

2004, when the BWC’s actuarial section, in conjunction with Mercer Oliver Wyman, analyzed

the effect of the group-rating program on private employers and PECs, or 2006, when Pinnacle

issued its study, that any actuarial study specifically addressed whether premium inequity existed
between group-rated and nongroup-rated public employers under the BWC’s group-rating plan.

The BWC did not offer any evidence in its opposition to the city’s summary judgment motion or

its own motion for summary judgment that the results of these later studies were available to

Romero or the city at time the city made any of the premium payments at issue.17 Accordingly,

the trial court did not err in rejecting the BWC’s voluntary payment defense.

4. Evidence on the Issue of Liability

a. Statutory Requirements and Premium Overcharges

{¶96} The BWC argues that even if the trial court did not err in rejecting its affirmative

defenses, it still erred in granting summary judgment to the city on the issue of liability because

the city failed to show that there were no genuine issues of material fact that the BWC

overcharged the city for its workers’ compensation premiums and violated its statutory duties

under R.C. 4123.29, 4123.34 or 4123.39.

{¶97} R.C. 4123.39 provides, in relevant part:

The administrator of workers’ compensation shall determine the amount of money
to be contributed under section 4123.38 of the Revised Code by the state itself and
each county and each taxing district within each county. In fixing the amount of
contribution to be made by the county, for such county and for the taxing districts
therein, the administrator shall classify counties and other taxing districts into
such groups as will equitably determine the contributions in accordance with the
relative degree of hazard, and also merit rate such individual counties, taxing
districts, or groups of taxing districts in accordance with their individual accident
experience so as ultimately to provide for each taxing subdivision contributing an
amount sufficient to meet its individual obligations
and to maintain a solvent public insurance fund. * * *

17
The BWC asserts in its brief that Romero testified that he knew prior to January 2002 that “Cleveland had
‘overpaid’ workers’ compensation premiums,” that he first learned of “Cleveland’s payment of the allegedly ‘excess
premiums,’” when he worked for the BWC and that “this issue was ‘public knowledge’ in the early 2000s.”
(Emphasis added.) This is not correct. As indicated above, Romero’s testimony was much more general and did
not establish that he knew in the 1990s or early 2000s that the city, specifically, was being overcharged for its
workers’ compensation premiums based on the impact of group rating.
 {¶98} Former R.C. 4123.29(A)(4)(c) and 4123.34(C) further require the BWC to

“consider an employer group as a single employing entity for purposes of retrospective rating”

and to “develop fixed and equitable rules controlling the rating system, which rules shall

conserve to each risk the basic principles of workers’ compensation insurance.”

{¶99} As detailed above, the city presented evidence of numerous actuarial studies and

testimony by BWC representatives establishing that under the BWC’s group-rating program,

group-rated employers received excessive, unwarranted discounts off their workers’

compensations premiums and that nongroup-rated employers, including PECs like the city, were

charged higher premiums to make up for and subsidize those discounts. The evidence showed

that during the time period at issue, the BWC used an inflated off-balance factor in calculating

workers’ compensation premiums for both private and PEC employers, resulting in higher

premiums for all nongroup-rated employers, including the city. The city further showed that the

BWC’s use of an inflated off-balance factor adversely impacted the city’s premiums both when it

was experience rated (from 1997 to 2002) and when it was retrospectively rated (from 2003 to

2009) because the minium premium it paid as a retrospectively rated employer was a percentage

of the experience-rated premium it would have otherwise paid if it were not retrospectively rated.

{¶100} The city presented evidence that the BWC’s group-rating program, as it impacted

nongroup-rated PECs, was inequitable and violated Ohio law. In San Allen, this court held that

the BWC’s group-rating program violated former R.C. 4123.29(A)(4)(c) because the BWC’s

group-rating plans were prospective group-rating plans and that statute by its terms, authorized

only “retrospective” group-rating plans. The San Allen court also held that, as applied to private

employers, the group-rating program was inequitable and unlawful under R.C. 4123.34(C) and
that the BWC was unjustly enriched by the premium overcharges it received from class members

who were nongroup rated throughout the class period.

{¶101} Bravender, Carlson and Pedrick testified that the same inequities in the

group-rating program at issue in San Allen with respect to nongroup-rated private employers also

existed with respect to nongroup-rated PEC employers like the city — i.e., the difference

between the inequities from the group-rating program as applied to private and PEC employers

was a matter of degree, not of kind.

{¶102} The city’s evidence supports the conclusion that, as applied to nongroup-rated

PECs like the city, the BWC’s group-rating plan violated R.C. 4123.34(C) and 4123.39 as well

as former R.C. 4123.29(A)(4)(c). The BWC’s group-rating program violated the mandate under

R.C. 4123.34(C) that the BWC “develop fixed and equitable rules controlling the rating system,

which rules shall conserve to each risk the basic principles of workers’ compensation insurance”

and did not result in an “equitabl[e] determin[ation] [of] contributions in accordance with the

relative degree of hazard” and “merit rat[ing] * * * in accordance with * * * individual accident

experience” as required under R.C. 4123.39.

{¶103} The BWC asserts that it “presented a host of evidence” on summary judgment

that “disputed whether Cleveland was overcharged” and “rebutted whether the Bureau violated

various provisions of the Ohio Revised Code and * * * was unjustly enriched”; however, the

record reflects otherwise. The BWC did not present any evidence on summary judgment

challenging the actuarial studies and testimony from Bravender, Carlson and Pedrick regarding

the inequities in the group-rating program as applied to both private employers and PECs.

Further, the BWC did not dispute that it used an inflated off-balance factor in order to fund
excessive discounts given to group-rated employers under its group-rating program, resulting in

higher premiums for nongroup-rated employers.

{¶104} Although the BWC offered deposition testimony from its expert, Josephson, in

opposing the city’s motion for summary judgment, that testimony did not demonstrate the

existence of any genuine issue of material fact on the issue of liability. Josephson estimated that

the city paid $2.7 million in higher premiums from 1997 to 2009 as a result of the BWC’s

group-rating program. Josephson testified that he was not asked to evaluate whether the city

was “overcharged” for its workers’ compensation premiums during the time period at issue and,

therefore, did not formulate an opinion on that issue. He did not consider whether the city’s

premiums during this time period were “fair” given the impact of group rating and had no

opinion as to whether the rating system violated Ohio law as applied to nongroup-rated PEC

employers. Josephson testified that his opinions would not change even if the BWC “may not

have followed statutory requirements in this case related to Cleveland.”

b. “Unjust” Enrichment

{¶105} The BWC also argues that the trial court applied an “incorrect standard” when

ruling on the parties’ motions for summary judgment, failing to “balance the equities” and

consider the “totality of the circumstances.” It contends that a genuine issue of material fact

exists as to whether the BWC was “actually unjustly enriched” because (1) the “alleged premium

overcharges” in this case were “not nearly of the same magnitude as those experienced by private

employers” in San Allen and did not “fall outside the general variability of rate-making” and (2)

there were “material factual disputes” regarding the “calculation of the alleged premium

overcharges” that precluded summary judgment on the city’s unjust enrichment claim.
 {¶106} “‘Enrichment alone’” is insufficient to “‘invoke the remedial powers of a court of

equity.’” Chestnut v. Progressive Cas. Ins. Co., 166 Ohio App.3d 299, 2006-Ohio-2080, 830

N.E.2d 751, ¶ 30 (8th Dist.), quoting Directory Servs. Group v. Staff Builders Internatl., 8th Dist.

Cuyahoga No. 78611, 2001 Ohio App. LEXIS 3108 (July 12, 2001). Because the city sought

equitable relief based upon a claim of unjust enrichment, it was required to “go further and show

that under the circumstances,’” it has “‘superior equity’” so that “‘it would be unconscionable for

[the BWC] to retain the benefit.’” United States Health Practices, Inc. v. Blake, 10th Dist.

Franklin No. 00AP-1002, 2001 Ohio App. LEXIS 1291,*6 (Mar. 22, 2001), quoting Katz v.

Banning, 84 Ohio App.3d 543, 552, 617 N.E.2d 729 (10th Dist.1992). This requires

consideration of “the sum of [the] circumstances, as well as the equities involved in the case.”

United States Health Practices at *8.

{¶107} As this court explained in San Allen, a plaintiff is not always entitled to equitable

restitution, as a matter of law, whenever funds are unlawfully collected and retained by the state.

“Equity * * * demands that, in fashioning an equitable remedy, the court look at the full picture.”

San Allen, 2014-Ohio-2071, 11 N.E.3d 739, at ¶ 174.

[W]here the state collects and retains funds to which the state is not lawfully
entitled, those funds must be returned as the equities require. * * * In certain
cases, the unlawful collection and retention of funds by the state may, in and of
itself, constitute a sufficient basis for an award of equitable restitution, i.e., where
the only issue is whether the collection and retention of funds by the state was
unlawful and there is no dispute, once the state’s conduct is determined to be
unlawful, that (1) the state was unjustly enriched by its unlawful collection and
retention of funds and (2) the equities require return of the funds. See, e.g., State
ex rel. Minutemen [, Inc. v. Indus. Comm., 62 Ohio St.3d 158, 161, 580 N.E.2d
777 (1991)]; Arth Brass [& Aluminum Castings, Inc. v. Conrad], 104 Ohio St.3d
547, 2004-Ohio-6888, 820 N.E.2d 900; Judy [v. Ohio Bur. of Motor Vehicles],
100 Ohio St.3d 122, 2003-Ohio-5277, 797 N.E.2d 45. In others, * * * where
there are a number of equitable considerations bearing on whether the state was
unjustly enriched and, if so, the extent to which it was unjustly enriched, those
considerations must be weighed and a determination of unjust enrichment made
 before a court may properly award equitable restitution on a unjust enrichment
claim.

San Allen at ¶ 126.

{¶108} As this court stated in San Allen, we recognize that rate-making is “not an exact

science.” San Allen at ¶ 105, fn. 21. If the only evidence in the record was that the BWC had

charged the city 2.2% to 4% in higher premiums than it arguably should have charged the city

due to the “general variability of rate-making,” perhaps it would be that the equities would not

require restitution of the overcharges. However, that is not this case. In determining whether to

award equitable relief and, if so, the amount of restitution to be awarded, the trial court was

required to consider the “totality of the circumstances.” This is not a case in which employers

were overcharged for their premiums due to a difference of opinion in actuarial assumptions or

because the loss experience turned out to be better or worse than expected — elements within the

“general variability of rate-making.” In this case, the “totality of the circumstances” included

undisputed evidence that the BWC knowingly overcharged nongroup-rated PEC employers,

including the city, for their workers’ compensation premiums in order to fund excessive premium

discounts for group-rated employers. Undisputed evidence further established that the BWC

continued to operate its inequitable rating system long after its actuarial consultants warned the

BWC that the group-rating program was creating substantial premium inequity between

group-rated and nongroup-rated employers. The trial court properly considered the “totality of

the circumstances” in concluding that the BWC had been unjustly enriched and granting

summary judgment in favor of the city on the issue of liability.

{¶109} The parties’ factual disputes regarding the “calculation of the alleged premium

overcharges,” including the BWC’s challenges to Schwartz’s assumptions and methodology and
its claim that the minimum premiums the city paid during 2003-2009 did not fully compensate

the BWC for the risk the city transferred to the BWC under its retrospective-rating plan, did not

preclude summary judgment as to liability. Those factual disputes involved the extent to which

the city was entitled to equitable restitution on its unjust enrichment claim — as to which the trial

court denied summary judgment.

{¶110} The record reflects that the city met its burden on summary judgment on the issue

of liability. The city showed that there was no genuine issue of material fact that it conferred

benefits on the BWC in the form of excessive premium payments and that the BWC had

knowledge of the benefits conferred. If nongroup-rated employers had not paid the excessive

premiums they were charged, the BWC would have experienced a shortfall in the total premiums

collected due to the large discounts it gave group-rated employers under its group-rating plan.

{¶111} The city also showed that there was no genuine issue of material fact that these

benefits were conferred under circumstances in which it would be unjust to allow the BWC to

retain them.

{¶112} Once the city met its burden, the burden shifted to the BWC. However, the

BWC did not meet its reciprocal burden. It did not point to any evidence of specific facts

demonstrating the existence of a genuine issue of fact for trial on these issues.

{¶113} Accordingly, the trial court did not err in entering summary judgment in favor of

the city as to liability. The BWC’s second assignment of error is overruled.

C. Trial on Restitution

1. Motion in Limine to Exclude Evidence of Affirmative Defenses

{¶114} In its third assignment of error, the BWC contends that the trial court abused its

discretion by denying the BWC an opportunity to assert at trial that Ohio Adm.Code
4123-17-17(C), the statute of limitations and the voluntary payment doctrine barred or limited

the restitution the city could properly recover on its unjust enrichment claim.

{¶115} Prior to trial, the city filed a motion in limine to preclude the BWC from

presenting evidence of and arguing at trial any of the affirmative defenses it had relied upon in

opposing the city’s motion for summary judgment. The trial court granted the motion,

indicating that the BWC would not be permitted to “relitigat[e] the issue [of liability] with

respect to the affirmative defenses” at trial. The BWC then filed written offers of proof setting

forth anticipated testimony from Romero and other evidence it would have presented at trial

related to five affirmative defenses: (1) the voluntary payment doctrine, (2) Ohio Adm.Code

4123-17-17(C), (3) the statute of limitations, (4) laches and (5) “equitable discretion when

examining the totality of the circumstances.”18

{¶116} We review a trial court’s ruling on a motion in limine for abuse of discretion.

See, e.g., Cohen & Co. v. Breen, 8th Dist. Cuyahoga No. 100775, 2014-Ohio-3915, ¶ 18. A

trial court abuses its discretion when its decision is unreasonable, arbitrary or unconscionable.

The trial court did not abuse its discretion in granting the city’s motion in limine in this case.

{¶117} The trial court had already considered and rejected each of the affirmative

defenses at issue when ruling on the parties’ cross-motions for summary judgment. For the

reasons explained above, these affirmative defenses were not meritorious and the trial court did

not err in granting summary judgment in favor of the city on liability notwithstanding these

affirmative defenses. Accordingly, the trial court did not abuse its discretion in granting the

city’s motion in limine. The BWC’s third assignment of error is overruled.

18
On appeal, the BWC does not contend that the trial court erred in granting the motion with respect to its defenses
of laches and “equitable discretion when examining the totality of the circumstances.”
 2. Manifest Weight of the Evidence

{¶118} The BWC’s fourth and fifth assignments of error involve challenges based on the

manifest weight of the evidence. In its fourth assignment of error, the BWC contends that the

trial court’s denial of its motion to dismiss the city’s claim under Civ.R. 41(B)(2) was against the

manifest weight of the evidence because Schwartz’s testimony was not based on “actuarially

sound assumptions.” In its fifth assignment of error the BWC contends that the trial court’s

restitution award should be reversed as against the manifest weight of the evidence because (1)

the premium overcharges were not material and did not “fall outside the general variability of

rate-making so as to require the BWC to pay restitution,” (2) the BWC’s rate-making process is

prospective and adjustments due to changes in the ratemaking process are applied to future

premiums, not as refunds related to prior periods, (3) Schwartz failed to use actuarially sound

principles in calculating the amount of the premium overcharges and (4) the trial court’s

restitution award does not account for the fact that, during the years the city was retrospectively

rated, the minimum premiums the city paid did not fully compensate the BWC for the risk it

transferred to the BWC. None of these arguments is persuasive.

{¶119} Weight of the evidence concerns “the inclination of the greater amount of

credible evidence, offered in a trial, to support one side of the issue rather than the other.” State

v. Thompkins, 78 Ohio St.3d 380, 387, 678 N.E.2d 541 (1997), quoting Black’s Law Dictionary

1594 (6th Ed.1990). When conducting a manifest weight review, this court reviews the entire

record, “‘weighs the evidence and all reasonable inferences, considers the credibility of witnesses

and determines whether in resolving conflicts in the evidence, the [finder of fact] clearly lost its

way and created such a manifest miscarriage of justice that the [judgment] must be reversed and

a new trial ordered.’” Eastley v. Volkman, 132 Ohio St.3d 328, 2012-Ohio-2179, 972 N.E.2d
517, ¶ 20, quoting Tewarson v. Simon, 141 Ohio App.3d 103, 115, 750 N.E.2d 176 (9th

Dist.2001). However, in weighing the evidence, we “must always be mindful of the

presumption in favor of the finder of fact.” Eastley at ¶ 21, citing Seasons Coal Co., Inc. v.

Cleveland, 10 Ohio St.3d 77, 80, 461 N.E.2d 1273 (1984), fn. 3. “If the evidence is susceptible

of more than one construction, the reviewing court is bound to give it that interpretation which is

consistent with the verdict and judgment, most favorable to sustaining the verdict and judgment.”

Seasons Coal at 80, fn. 3, quoting 5 Ohio Jurisprudence 3d, Appellate Review, Section 60, at

191-192 (1978).

{¶120} First, we already considered and rejected the BWC’s materiality and

“rate-making” arguments in reviewing the BWC’s second assignment of error.

{¶121} With respect to the claimed deficiencies in Schwartz’s testimony, the BWC

stipulated that Schwartz was qualified as an actuarial expert. The BWC did not object to or

move to exclude any of his testimony as unreliable under Evid.R. 702(C). Indeed, the BWC

specifically stated, when arguing its Civ.R. 41(B)(2) motion, that it was not seeking to strike

Schwartz’s testimony.

{¶122} The methodology Schwartz applied in this case was similar to the approach he

used when calculating the restitution due the plaintiff class in San Allen. In that case, this court

held that the BWC’s arguments regarding the claimed deficiencies in Schwartz’s opinions and

calculations did not preclude the trial court from relying on that testimony in determining the

amount of restitution to be awarded. San Allen, 2014-Ohio-2071, 11 N.E.3d 739, at ¶ 143-145.

We reach the same conclusion here.

{¶123} At trial, Schwartz and Josephson offered two competing methodologies for

determining the amount of restitution, if any, to be awarded the city on its unjust enrichment
claim. Each expert’s opinions and calculations (and alleged deficiencies in those opinions and

calculations) were explored at length by the parties on direct and cross-examination.

{¶124} As detailed above, the BWC criticized Schwartz’s approach because Schwartz

used a single off-balance factor of 1.01 for all years and failed to take into account the BWC’s

implementation of the group break-even factor and reduction of the maximum credibility when

calculating the impact of group rating on the city’s premiums. Schwartz testified that he

selected a single value of 1.01 — the off-balance factor used by the BWC in 2010 — for all years

when calculating premium overcharges because 2010 was the year closest to the historical period

at issue and “actuaries often rely on the data closest to what you’re trying to estimate.” He

testified that if he had used the uniform off-balance factor used by the BWC in 2011 or 2012 (or

an average of the uniform off-balance factors used in 2010 to 2012), the amount of the

overcharge would have been higher. He testified that the average of the uniform off-balance

factors for all six years after rate reform was put into effect (i.e., from 2010 to 2015) was 1.018,

supporting his opinion that 1.01 is “a pretty good actuarial value.”

{¶125} Schwartz testified that he did not include a “break-even factor” or a credibility

limit of 77 percent in his calculations because the break-even factor and limit on maximum

credibility were meant to increase the premiums paid by group employers and were not intended

to impact the premiums paid by nongroup-rated employers “in any material way.” He claimed

that because neither a break-even factor nor a credibility limit of 77 percent was used at any point

during 1997-2009, such elements would not have an effect on the experience modifiers used

during that time period.

{¶126} The city, in turn, criticized Josephson’s inclusion of a group break-even factor and

a 77 percent limit on credibility in his calculations of the impact of group rating on the city’s
premiums because they did not exist prior to 2010. The city also criticized the assumptions

Josephson used in calculating his recalculated off-balance factors. The city pointed out that the

average of Josephson’s recalculated off-balance factors for 1997 to 2009 was 1.023, higher than

both the uniform off-balance factor the BWC adopted in 2010 and the 1.018 average of the

uniform off-balance factors the BWC had adopted for the six years since 2010. The city also

pointed out that Josephson’s recalculated off-balance factors exceeded the 1.01 off-balance factor

for 9 of the 13 years for which he calculated an off-balance factor. Further, due to missing data,

Josephson used a different method to recalculate the uniform off-balance factors for years 1997

to 2002 than he did for 2003 to 2009. To recalculate off-balance factors for 1997 to 2003,

Josephson used an average of data from 2006 and 2009 to create a single “selected factor” that

was used to recalculate off-balance factors for 1997 to 2002. If Josephson had used an average

of the data from all of the years for which data was available (2003 to 2009) when calculating the

off-balances for 1997 to 2002, the recalculated off-balance factors would have been lower and

the premium impact for those years would have been higher than what Josephson calculated.

Josephson testified that his assumptions were actuarially sound and that he used the data from

2006 and 2009 to recalculate off-balance factors for 1997 to 2002 because he believed they

would be “a better measure” for the years he was trying to project than data from other years.

{¶127} As the foregoing demonstrates, Schwartz and Josephson disagreed both as to the

assumptions and methodology to be used in calculating the effect of group rating on the city’s

premiums. Nevertheless, each expert was deemed to be qualified to opine upon the actuarial

issues in this case. Each party presented a case for why its expert’s approach was the better

approach. The trial court was in the best position to determine the credibility of the witnesses
and the weight to be given their testimony, including their proposed calculation of the restitution

amount. Kalain v. Smith, 25 Ohio St.3d 157, 162, 495 N.E.2d 572 (1986).

{¶128} The BWC also contends the trial court’s restitution award was against the

manifest weight of the evidence because it “ignores” the fact that the city’s premiums were “too

low” during the years it was retrospectively rated.

{¶129} In San Allen, the trial court was ordered to modify its restitution award to account

for subsidy benefits class members who were group rated during part of the class period received

during the years in which they were group rated. The court held that because it was “the

group-rated employers (including, for the years in which they were group rated, class members

who participated in the BWC’s group rating plan) who truly benefitted under the BWC’s group

rating plan,” i.e., “receiving a windfall in the form of substantially reduced premiums subsidized

by nongroup-rated employers,” “[c]onsideration of the ‘totality of the circumstances’ and ‘sum

of the equities’” required the trial court to account for those subsidy benefits when determining

the amount of restitution to be awarded to the plaintiff class. San Allen at ¶ 135-136. In San

Allen, unlike in this case, certain of the plaintiffs had directly benefitted from the very unlawful

group-rating system from which they sought equitable restitution. The court held that those

benefits had to accounted for when determining the amount of restitution to be awarded the

plaintiff class.

{¶130} This case is different. As Carlson testified, the “shortcomings” in the BWC’s

retrospective-rating plan “had nothing to do with group rating.” The fact that, for a period of

time, the BWC did a poor job of estimating costs under its retrospective- rating plan and, in

hindsight, allegedly charged the city lower minimum premiums than it should have been charged

was a factor the trial court could have considered in determining an appropriate restitution award.
 However, on the record before us, we cannot say that the trial court, when considering the

“totality of the circumstances” and equities in this case, was required to account for those alleged

“undercharges” when determining the amount of restitution to award the city.

{¶131} After reviewing the entire record, we find that the trial court’s $4,524,392

restitution award was supported by substantial competent, credible evidence and was not against

the manifest weight of the evidence. This is not a case in which the trial court’s judgment

created “such a manifest miscarriage of justice” that it must be reversed. Accordingly, the

BWC’s fourth and fifth assignments of error are overruled.

{¶132} Judgment affirmed.

It is ordered that appellee recover from appellant the costs herein taxed.

The court finds there were reasonable grounds for this appeal.

It is ordered that a special mandate be sent to Cuyahoga County Court of Common Pleas

to carry this judgment into execution.

A certified copy of this entry shall constitute the mandate pursuant to Rule 27 of the

Rules of Appellate Procedure.

____________________________________________________
EILEEN A. GALLAGHER, ADMINISTRATIVE JUDGE

SEAN C. GALLAGHER, J., and
ANITA LASTER MAYS, J., CONCUR