(Slip Opinion) OCTOBER TERM, 2007 1
Syllabus
NOTE: Where it is feasible, a syllabus (headnote) will be released, as is
being done in connection with this case, at the time the opinion is issued.
The syllabus constitutes no part of the opinion of the Court but has been
prepared by the Reporter of Decisions for the convenience of the reader.
See United States v. Detroit Timber & Lumber Co., 200 U. S. 321, 337.
SUPREME COURT OF THE UNITED STATES
Syllabus
MEACHAM ET AL. v. KNOLLS ATOMIC POWER LABO-
RATORY, AKA KAPL, INC., ET AL.
CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR
THE SECOND CIRCUIT
No. 06–1505. Argued April 23, 2008—Decided June 19, 2008
When the National Government ordered its contractor, respondent
Knolls, to reduce its work force, Knolls had its managers score their
subordinates on “performance,” “flexibility,” and “critical skills”;
these scores, along with points for years of service, were used to de-
termine who was laid off. Of the 31 employees let go, 30 were at least
40 years old. Petitioners (Meacham, for short) were among those laid
off, and they filed this suit asserting, inter alia, a disparate-impact
claim under the Age Discrimination in Employment Act of 1967
(ADEA), 29 U. S. C. §621 et seq. To show such an impact, Meacham
relied on a statistical expert’s testimony that results so skewed ac-
cording to age could rarely occur by chance; and that the scores for
“flexibility” and “criticality,” over which managers had the most dis-
cretionary judgment, had the firmest statistical ties to the outcomes.
The jury found for Meacham on the disparate-impact claim, and the
Second Circuit initially affirmed. This Court vacated the judgment
and remanded in light of its intervening decision in Smith v. City of
Jackson, 544 U. S. 228. The Second Circuit then held for Knolls,
finding its prior ruling untenable because it had applied a “business
necessity” standard rather than a “reasonableness” test in assessing
the employer’s reliance on factors other than age in the layoff deci-
sions, and because Meacham had not carried the burden of persua-
sion as to the reasonableness of Knolls’s non-age factors.
Held: An employer defending a disparate-impact claim under the
ADEA bears both the burden of production and the burden of persua-
sion for the “reasonable factors other than age” (RFOA) affirmative
defense under §623(f)(1). Pp. 5–17.
(a) The ADEA’s text and structure indicate that the RFOA exemp-
2 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
Syllabus
tion creates an affirmative defense, for which the burden of persua-
sion falls on the employer. The RFOA exemption is listed alongside
one for bona fide occupational qualifications (BFOQ), which the Court
has recognized to be an affirmative defense: “It shall not be unlawful
for an employer . . . to take any action otherwise prohibited under
subsections (a), (b), (c), or (e) . . . where age is a [BFOQ] reasonably
necessary to the normal operation of the particular business, or
where the differentiation is based on [RFOA] . . . .” §623(f)(1). Given
that the statute lays out its exemptions in a provision separate from
the general prohibitions in §§623(a)–(c), (e), and expressly refers to
the prohibited conduct as such, it is no surprise that this Court has
spoken of both the BFOQ and RFOA as being among the ADEA’s
“five affirmative defenses,” Trans World Airlines, Inc. v. Thurston,
469 U. S. 111, 122. This reading follows the familiar principle that
“[w]hen a proviso . . . carves an exception out of the body of a statute
or contract those who set up such exception must prove it,” Javierre
v. Central Altagracia, 217 U. S. 502, 508. As this longstanding con-
vention is part of the backdrop against which the Congress writes
laws, the Court respects it unless there is compelling reason to think
that Congress put the burden of persuasion on the other side. See
Schaffer v. Weast, 546 U. S. 49, 57–58. The Court has given this
principle particular weight in enforcing the Fair Labor Standards Act
of 1968, Corning Glass Works v. Brennan, 417 U. S. 188, 196–197;
and it has also recognized that “the ADEA [is] enforced in accordance
with the ‘powers, remedies, and procedures’ of the FLSA,” Lorillard
v. Pons, 434 U. S. 575, 580. Nothing in §623(f)(1) suggests that Con-
gress meant it to march out of step with either the general or specifi-
cally FLSA default rules placing the burden of proving an exemption
on the party claiming it. Any further doubt would be dispelled by the
natural implication of the “otherwise prohibited” language prefacing
the BFOQ and RFOA defenses. Pp. 5–9.
(b) Knolls argues that because the RFOA clause bars liability
where action is taken for reasons “other than age,” it should be read
as mere elaboration on an element of liability. But City of Jackson
confirmed that §623(a)(2)’s prohibition extends to practices with a
disparate impact, inferring this result in part from the presence of
the RFOA provision. 544 U. S., at 239, 243. And City of Jackson
made it clear that action based on a “factor other than age” is the
very premise for disparate-impact liability, not a negation of it or a
defense to it. Thus, it is assumed that a non-age factor was at work
in such a case, and the focus of the RFOA defense is on whether the
factor relied on was “reasonable.” Pp. 10–11.
(c) The business necessity test has no place in ADEA disparate-
impact cases; applying both that test and the RFOA defense would
Cite as: 554 U. S. ____ (2008) 3
Syllabus
entail a wasteful and confusing structure of proof. The absence of a
business necessity enquiry does not diminish, however, the reasons
already given for reading the RFOA as an affirmative defense. City
of Jackson cannot be read as implying that the burden of proving any
business-related defense falls on the plaintiff, for it confirmed that
the BFOQ is an affirmative defense, see 544 U. S., at 233, n. 3. More-
over, in referring to “Wards Cove’s interpretation of identical lan-
guage [in Title VII],” City of Jackson could not have had the RFOA
clause in mind, for Title VII has no like-worded defense. And as
Wards Cove did not purport to construe any Title VII defenses, only
an over-reading of City of Jackson would find in it an assumption
that Wards Cove has anything to say about statutory defenses in the
ADEA. Pp. 12–15.
(d) City of Jackson confirmed that an ADEA disparate-impact
plaintiff must “ ‘ “isolat[e] and identif[y] the specific employment prac-
tices that are allegedly responsible for any observed statistical dis-
parities.” ’ ” 544 U. S., at 241. This is not a trivial burden, and it
ought to allay some of the concern that recognizing an employer’s
burden of persuasion on an RFOA defense will encourage strike suits
or nudge plaintiffs with marginal cases into court; but in the end,
such concerns have to be directed at Congress, which set the balance
by both creating the RFOA exemption and writing it in the orthodox
format of an affirmative defense. Pp. 15–17.
461 F. 3d 134, vacated and remanded.
SOUTER, J., delivered the opinion of the Court, in which ROBERTS,
C. J., and STEVENS, KENNEDY, GINSBURG, and ALITO, JJ., joined, and in
which THOMAS, J., joined as to Parts I and II–A. SCALIA, J., filed an
opinion concurring in the judgment. THOMAS, J., filed an opinion con-
curring in part and dissenting in part. BREYER, J., took no part in the
consideration or decision of the case.
Cite as: 554 U. S. ____ (2008) 1
Opinion of the Court
NOTICE: This opinion is subject to formal revision before publication in the
preliminary print of the United States Reports. Readers are requested to
notify the Reporter of Decisions, Supreme Court of the United States, Wash-
ington, D. C. 20543, of any typographical or other formal errors, in order
that corrections may be made before the preliminary print goes to press.
SUPREME COURT OF THE UNITED STATES
_________________
No. 06–1505
_________________
CLIFFORD B. MEACHAM, ET AL., PETITIONERS v.
KNOLLS ATOMIC POWER LABORATORY,
AKA KAPL, INC., ET AL.
ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF
APPEALS FOR THE SECOND CIRCUIT
[June 19, 2008]
JUSTICE SOUTER delivered the opinion of the Court.
A provision of the Age Discrimination in Employment
Act of 1967 (ADEA), 81 Stat. 602, as amended, 29 U. S. C.
§621 et seq., creates an exemption for employer actions
“otherwise prohibited” by the ADEA but “based on reason-
able factors other than age” (RFOA). §623(f)(1). The
question is whether an employer facing a disparate-impact
claim and planning to defend on the basis of RFOA must
not only produce evidence raising the defense, but also
persuade the factfinder of its merit. We hold that the
employer must do both.
I
The National Government pays private companies to
do some of the work maintaining the Nation’s fleet of
nuclear-powered warships. One such contractor is
respondent KAPL, Inc. (Knolls), the operator of the
Government’s Knolls Atomic Power Laboratory, which
has a history dating back to the first nuclear-powered
submarines in the 1950s. The United States Navy and
the Department of Energy jointly fund Knolls’s opera-
2 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
Opinion of the Court
tions, decide what projects it should pursue, and set its
annual staffing limits. In recent years, Knolls has been
charged with designing prototype naval nuclear reactors
and with training Navy personnel to run them.
The demands for naval nuclear reactors changed with
the end of the Cold War, and for fiscal year 1996 Knolls
was ordered to reduce its work force. Even after a hun-
dred or so employees chose to take the company’s ensuing
buyout offer, Knolls was left with thirty-some jobs to cut.1
Petitioners (Meacham, for short) are among those laid off
in the resulting “involuntary reduction in force.” In order
to select those for layoff, Knolls told its managers to score
their subordinates on three scales, “performance,” “flexi-
bility,” and “critical skills.”2 The scores were summed,
along with points for years of service, and the totals de-
termined who should be let go.
Of the 31 salaried employees laid off, 30 were at least 40
years old.3 Twenty-eight of them sued, raising both dispa-
rate-treatment (discriminatory intent) and disparate-
impact (discriminatory result) claims under the ADEA and
——————
1 TheNaval Reactors program had lowered Knolls’s staffing limit by
108 people; as Knolls also had to hire 35 new employees for work
existing personnel could not do, a total of 143 jobs would have to go.
2 The “performance” score was based on the worker’s two most recent
appraisals. The “flexibility” instruction read: “Rate the employee’s
flexibility within the Laboratory. Can his or her documented skills be
used in other assignments that will add value to current or future Lab
work? Is the employee retrainable for other Lab assignments?” The
“critical skills” instruction read: “How critical are the employee’s skills
to continuing work in the Lab? Is the individual’s skill a key technical
resource for the [Naval Reactors] program? Is the skill readily accessi-
ble within the Lab or generally available from the external market?”
App. 94–95 (emphasis in original).
3 For comparison: after the voluntary buyouts, 1,203 out of 2,063
salaried workers (or 58%) were at least 40 years old; and of the 245 who
were at risk of involuntary layoff, and therefore included in the rank-
ings scheme, 179 (or 73%) were 40 or over. Meacham v. Knolls Atomic
Power Laboratory, 185 F. Supp. 2d 193, 203 (NDNY 2002).
Cite as: 554 U. S. ____ (2008) 3
Opinion of the Court
state law, alleging that Knolls “designed and implemented
its workforce reduction process to eliminate older employ-
ees and that, regardless of intent, the process had a dis-
criminatory impact on ADEA-protected employees.”
Meacham v. Knolls Atomic Power Laboratory, 381 F. 3d
56, 61 (CA2 2004) (Meacham I). To show a disparate
impact, the workers relied on a statistical expert’s testi-
mony to the effect that results so skewed according to age
could rarely occur by chance;4 and that the scores for
“flexibility” and “criticality,” over which managers had the
most discretionary judgment, had the firmest statistical
ties to the outcomes. Id., at 65.
The jury found for Meacham on the disparate-impact
claim (but not on the disparate-treatment claim). The
Court of Appeals affirmed, after examining the verdict
through the lens of the so-called “burden shifting” scheme
of inference spelled out in Wards Cove Packing Co. v.
Atonio, 490 U. S. 642 (1989). See Meacham I, supra, at
74–76.5 After Knolls sought certiorari, we vacated the
judgment and remanded for further proceedings in light of
Smith v. City of Jackson, 544 U. S. 228 (2005), decided
——————
4 The expert cut the data in different ways, showing the chances to be
1 in 348,000 (based on a population of all 2,063 salaried workers); 1 in
1,260 (based on a population of the 245 workers at risk of layoff); or 1 in
6,639 (when the analysis was broken down by sections of the company).
Meacham I, 381 F. 3d, at 64–65.
5 Taking the Wards Cove steps in turn, the Court of Appeals con-
cluded that the “jury could have found that the degree of subjective
decision making allowed in the [layoff procedure] created the disparity,”
381 F. 3d, at 74; that the employer had answered with evidence of a
“facially legitimate business justification,” a need “to reduce its work-
force while still retaining employees with skills critical to the perform-
ance of [Knolls’s] functions,” ibid. (internal quotation marks omitted);
and that petitioners would prevail nonetheless because “[a]t least one
suitable alternative is clear from the record,” that Knolls “could have
designed [a procedure] with more safeguards against subjectivity, in
particular, tests for criticality and flexibility that are less vulnerable to
managerial bias,” id., at 75.
4 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
Opinion of the Court
while Knolls’s petition was pending. See 544 U. S. 957
(2005).
On remand, the same Court of Appeals panel ruled in
favor of Knolls, over a dissent. 461 F. 3d 134 (CA2 2006)
(case below) (Meacham II). The majority found its prior
ruling “untenable” because it had applied the Wards Cove
“business necessity” standard rather than a “reasonable-
ness” test, contrary to City of Jackson; and on the latter
standard, Meacham, the employee, had not carried the
burden of persuasion. 461 F.3d, at 140–141, 144.6 In
dissent, Judge Pooler took issue with the majority for
confusing business justifications under Wards Cove with
the statutory RFOA exemption, which she read to be an
affirmative defense with the burden of persuasion falling
on defendants. 461 F.3d, at 147, 149–152.7
Meacham sought certiorari, noting conflicting decisions
assigning the burden of persuasion on the reasonableness
of the factor other than age; the Court of Appeals in this
case placed it on the employee (to show the non-age factor
unreasonable), but the Ninth Circuit in Criswell v. West-
ern Airlines, Inc., 709 F. 2d 544, 552 (1983), had assigned
——————
6 Distinguishing the two tests mattered, the Court of Appeals ex-
plained, because even though “[t]here may have been other reasonable
ways for [Knolls] to achieve its goals (as we held in [Meacham I]), . . .
the one selected was not unreasonable.” Meacham II, 461 F. 3d, at 146
(citation and internal quotation marks omitted). The burden of persua-
sion for either test was said to fall on the plaintiff, however, because
“the employer is not to bear the ultimate burden of persuasion with
respect to the legitimacy of its business justification.” Id., at 142 (citing
Wards Cove, 490 U. S., at 659–660; internal quotation marks omitted).
The majority took note of the textual signs that the RFOA was an
affirmative defense, but set them aside because “City of Jackson . . .
emphasized that there are reasonable and permissible employment
criteria that correlate with age,” thereby leaving it to plaintiffs to prove
that a criterion is not reasonable. 461 F.3d, at 142–143.
7 In Judge Pooler’s view, a jury “could permissibly find that defen-
dants had not established a RFOA based on the unmonitored subjectiv-
ity of [Knolls’s] plan as implemented.” Id., at 153 (dissenting opinion).
Cite as: 554 U. S. ____ (2008) 5
Opinion of the Court
it to the employer (to show the factor was a reasonable
one). In fact it was in Criswell that we first took up this
question, only to find it not well posed in that case. West-
ern Air Lines, Inc. v. Criswell, 472 U. S. 400, 408, n. 10
(1985). We granted certiorari, 552 U. S. ___ (2007), and
now vacate the judgment of the Second Circuit and
remand.8
II
A
The ADEA’s general prohibitions against age discrimi-
nation, 29 U. S. C. §§623(a)–(c), (e), are subject to a sepa-
rate provision, §623(f), creating exemptions for employer
practices “otherwise prohibited under subsections (a), (b),
(c), or (e).” The RFOA exemption is listed in §623(f) along-
side one for bona fide occupational qualifications (BFOQ):
“It shall not be unlawful for an employer . . . to take any
action otherwise prohibited under subsections (a), (b), (c),
or (e) . . . where age is a bona fide occupational qualifica-
tion reasonably necessary to the normal operation of the
particular business, or where the differentiation is based
on reasonable factors other than age . . . .” §623(f)(1).
Given how the statute reads, with exemptions laid out
apart from the prohibitions (and expressly referring to the
prohibited conduct as such), it is no surprise that we have
already spoken of the BFOQ and RFOA provisions as
being among the ADEA’s “five affirmative defenses,”
Trans World Airlines, Inc. v. Thurston, 469 U. S. 111, 122
(1985). After looking at the statutory text, most lawyers
would accept that characterization as a matter of course,
——————
8 Petitioners also sought certiorari as to “[w]hether respondents’ prac-
tice of conferring broad discretionary authority upon individual manag-
ers to decide which employees to lay off during a reduction in force
constituted a ‘reasonable factor other than age’ as a matter of law.”
Pet. for Cert. i. We denied certiorari on this question and express no
views on it here.
6 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
Opinion of the Court
thanks to the familiar principle that “[w]hen a proviso . . .
carves an exception out of the body of a statute or contract
those who set up such exception must prove it.” Javierre
v. Central Altagracia, 217 U. S. 502, 508 (1910) (opinion
for the Court by Holmes, J.); see also FTC v. Morton Salt
Co., 334 U. S. 37, 44–45 (1948) (“[T]he burden of proving
justification or exemption under a special exception to the
prohibitions of a statute generally rests on one who claims
its benefits . . .”); United States v. First City Nat. Bank of
Houston, 386 U. S. 361, 366 (1967) (citing Morton Salt,
supra, at 44–45). That longstanding convention is part of
the backdrop against which the Congress writes laws, and
we respect it unless we have compelling reasons to think
that Congress meant to put the burden of persuasion on
the other side. See Schaffer v. Weast, 546 U. S. 49, 57–58
(2005) (“Absent some reason to believe that Congress
intended otherwise, therefore, we will conclude that the
burden of persuasion lies where it usually falls, upon the
party seeking relief”).
We have never been given any reason for a heterodox
take on the RFOA clause’s nearest neighbor, and our prior
cases recognize that the BFOQ clause establishes an
affirmative defense against claims of disparate treatment.
See, e.g., City of Jackson, supra, at 233, n. 3; Western Air
Lines, Inc., supra, at 414–419, and nn. 24, 29. We have
likewise given the affirmative defense construction to the
exemption in the Equal Pay Act of 1963 for pay differen-
tials based on “any other factor other than sex,” Corning
Glass Works v. Brennan, 417 U. S. 188, 196 (1974) (inter-
nal quotation marks omitted); and there, we took account
of the particular weight given to the interpretive conven-
tion already noted, when enforcing the Fair Labor Stan-
dards Act of 1938 (FLSA), id., at 196–197 (“[T]he general
rule [is] that the application of an exemption under the
Fair Labor Standards Act is a matter of affirmative de-
fense on which the employer has the burden of proof”).
Cite as: 554 U. S. ____ (2008) 7
Opinion of the Court
This focus makes the principle of construction the more
instructive in ADEA cases: “[i]n enacting the ADEA, Con-
gress exhibited both a detailed knowledge of the FLSA
provisions and their judicial interpretation and a willing-
ness to depart from those provisions regarded as undesir-
able or inappropriate for incorporation,” Lorillard v. Pons,
434 U. S. 575, 581 (1978). And we have remarked and
relied on the “significant indication of Congress’ intent in
its directive that the ADEA be enforced in accordance with
the ‘powers, remedies, and procedures’ of the FLSA.” Id.,
at 580 (quoting 29 U. S. C. §626(b); emphasis deleted); see
also Fogerty v. Fantasy, Inc., 510 U. S. 517, 528 (1994)
(applying reasoning of Lorillard); Thurston, supra, at 126
(same). As against this interpretive background, there is
no hint in the text that Congress meant §623(f)(1) to
march out of step with either the general or specifically
FLSA default rules placing the burden of proving an ex-
emption on the party claiming it.
With these principles and prior cases in mind, we find it
impossible to look at the text and structure of the ADEA
and imagine that the RFOA clause works differently from
the BFOQ clause next to it. Both exempt otherwise illegal
conduct by reference to a further item of proof, thereby
creating a defense for which the burden of persuasion falls
on the “one who claims its benefits,” Morton Salt Co.,
supra, at 44–45, the “party seeking relief,” Schaffer, supra,
at 57–58, and here, “the employer,” Corning Glass Works,
supra, at 196.
If there were any doubt, the stress of the idiom “other-
wise prohibited,” prefacing the BFOQ and RFOA condi-
tions, would dispel it.9 The implication of affirmative
——————
9 We do not need to seek further relief from doubt by looking to the
Equal Employment Opportunity Commission (EEOC) regulations on
burdens of proof in ADEA cases. The parties focus on two of them, but
we think neither clearly answers the question here. One of them the
Government has disavowed as overtaken by our decision in Smith v.
8 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
Opinion of the Court
defense is underscored by contrasting §623(f)(1) with the
section of the ADEA at issue in Public Employees Retire-
ment System of Ohio v. Betts, 492 U. S. 158 (1989), and by
the way Congress responded to our decision there. In
Betts, we said the issue was whether a provision in a
former version of §623(f)(2), one about employee benefit
plans, merely “redefine[d] the elements of a plaintiff’s
prima facie case,” or instead “establish[ed] a defense” to
what “otherwise would be a violation of the Act.” Id., at
181.10 Although the provision contained no “otherwise
prohibited” kind of language, we said that it “appears on
first reading to describe an affirmative defense.” Ibid. We
nonetheless thought that this more natural view (which
——————
City of Jackson, 544 U. S. 228 (2005), Brief for United States as Amicus
Curiae 16, n. 1 (noting that 29 CFR §1625.7(d) (2007) “takes a position
that does not survive” City of Jackson), for the regulation seems to
require a showing of business necessity as a part of the RFOA defense.
Compare 29 CFR §1625.7(d) (“When an employment practice, including
a test, is claimed as a basis for different treatment . . . on the grounds
that it is a ‘factor other than’ age, and such a practice has an adverse
impact on individuals within the protected age group, it can only be
justified as a business necessity”), with City of Jackson, supra, at 243
(“Unlike the business necessity test, which asks whether there are
other ways for the employer to achieve its goals that do not result in a
disparate impact on a protected class, the reasonableness inquiry
includes no such requirement”). And the second regulation would take
a bit of stretching to cover disparate-impact cases, for its text speaks in
terms of disparate treatment. See 29 CFR §1625.7(e) (concerning use of
the RFOA defense against an “individual claim of discriminatory
treatment”). The EEOC has lately proposed rulemaking that would
revise both of these regulations, eliminating any reference to “business
necessity” and placing the burden of proof on the employer “[w]henever
the exception of ‘a reasonable factor other than age’ is raised.” 73 Fed.
Reg. 16807–16809 (Mar. 31, 2008) (proposed 29 CFR §1625.7(e)).
10 The provision read: “It shall not be unlawful for an employer . . . to
observe the terms of . . . any bona fide employee benefit plan such as a
retirement, pension, or insurance plan, which is not a subterfuge to
evade the purposes of this chapter . . . because of the age of such indi-
vidual.” 29 U. S. C. §623(f)(2) (1982 ed.).
Cite as: 554 U. S. ____ (2008) 9
Opinion of the Court
we had taken in Thurston) was overridden by evidence of
legislative history, by the peculiarity of a pretext-revealing
condition in the phrasing of the provision (that a benefit
plan “not [be] a subterfuge to evade the purposes” of the
ADEA), and by the parallel with a prior case construing an
“analogous provision of Title VII” (analogous because it
also contained a pretext-revealing condition). 492 U. S., at
181. A year later, however, Congress responded to Betts
by enacting the Older Workers Benefit Protection Act,
Pub. L. 101–433, 104 Stat. 978, avowedly to “restore the
original congressional intent” that the ADEA’s benefits
provision be read as an affirmative defense, id., §101.
What is instructive on the question at hand is that, in
clarifying that §623(f)(2) specifies affirmative defenses,
Congress not only set the burden in so many words but
also added the phrase “otherwise prohibited” as a part of
the preface (just as in the text of §623(f)(1)).11 Congress
thus confirmed the natural implication that we find in the
“otherwise prohibited” language in §623(f)(1): it refers to
an excuse or justification for behavior that, standing
alone, violates the statute’s prohibition. The amendment
in the aftermath of Betts shows that Congress under-
stands the phrase the same way we naturally read it, as a
clear signal that a defense to what is “otherwise prohib-
ited” is an affirmative defense, entirely the responsibility
of the party raising it.
——————
11 Congress surely could not have meant this phrase to contradict its
express allocation of the burden, in the same amendment. But that
would be the upshot of Knolls’s suggestion that the only way to read the
word “otherwise” as not redundant in the phrase “otherwise prohibited
under subsection (a), (b), (c), or (e)” is to say that the word must refer
only to §623(f)(1) itself, implying that §623(f)(1) must be a liability-
creating provision for which the burden falls on the plaintiff. Brief for
Respondents 33, and n. 7. Besides, this argument proves too much, for
it implies that even the BFOQ exemption is not an affirmative defense.
10 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
Opinion of the Court
B
Knolls ventures that, regardless, the RFOA provision
should be read as mere elaboration on an element of liabil-
ity. Because it bars liability where action is taken for
reasons “other than age,” the argument goes, the provision
must be directed not at justifying age discrimination by
proof of some extenuating fact but at negating the premise
of liability under §623(a)(2), “because of age.”
The answer to this argument, however, is City of Jack-
son, where we confirmed that the prohibition in §623(a)(2)
extends to practices with a disparate impact, inferring this
result in part from the presence of the RFOA provision at
issue here.12 We drew on the recognized distinction be-
tween disparate-treatment and disparate-impact forms of
liability, and explained that “the very definition of dispa-
rate impact” was that “an employer who classifies his
employees without respect to age may still be liable under
the terms of this paragraph if such classification adversely
affects the employee because of that employee’s age.” 544
U. S., at 236, n. 6 (plurality opinion); id., at 243 (SCALIA,
J., concurring in part and concurring in judgment) (ex-
pressing agreement with “all of the Court’s reasoning” in
the plurality opinion, but finding it a basis for deference to
the EEOC rather than for independent judicial decision).
We emphasized that these were the kinds of employer
activities, “otherwise prohibited” by §623(a)(2), that were
mainly what the statute meant to test against the RFOA
condition: because “[i]n disparate-impact cases . . . the
allegedly ‘otherwise prohibited’ activity is not based on
age,” it is “in cases involving disparate-impact claims that
the RFOA provision plays its principal role by precluding
——————
12 Indoing so, we expressly rejected the so-called “safe harbor” view of
the RFOA provision. See City of Jackson, 544 U. S., at 238–239 (plural-
ity opinion); id., at 252–253 (O’Connor, J., concurring in judgment)
(describing “safe harbor” view).
Cite as: 554 U. S. ____ (2008) 11
Opinion of the Court
liability if the adverse impact was attributable to a non-
age factor that was ‘reasonable.’ ” Id., at 239 (plurality
opinion).
Thus, in City of Jackson, we made it clear that in the
typical disparate-impact case, the employer’s practice is
“without respect to age” and its adverse impact (though
“because of age”) is “attributable to a nonage factor”; so
action based on a “factor other than age” is the very prem-
ise for disparate-impact liability in the first place, not a
negation of it or a defense to it. The RFOA defense in a
disparate-impact case, then, is not focused on the asserted
fact that a non-age factor was at work; we assume it was.
The focus of the defense is that the factor relied upon was
a “reasonable” one for the employer to be using. Reason-
ableness is a justification categorically distinct from the
factual condition “because of age” and not necessarily
correlated with it in any particular way: a reasonable
factor may lean more heavily on older workers, as against
younger ones, and an unreasonable factor might do just
the opposite.13
——————
13 The factual causation that §623(a)(2) describes as practices that
“deprive or tend to deprive . . . or otherwise adversely affect [employees]
. . . because of . . . age” is typically shown by looking to data revealing
the impact of a given practice on actual employees. See, e.g., City of
Jackson, 544 U. S., at 241 (opinion of the Court); cf. Wards Cove Pack-
ing Co. v. Atonio, 490 U. S. 642, 657, 658–659 (1989) (under Title VII,
“specific causation” is shown, and a “prima facie case” is “establish[ed],”
when plaintiff identifies a specific employment practice linked to a
statistical disparity); Watson v. Fort Worth Bank & Trust, 487 U. S.
977, 995 (1988) (plurality opinion) (in Title VII cases, “statistical
disparities must be sufficiently substantial that they raise . . . an
inference of causation”).
This enquiry would be muddled if the value, “reasonableness,” were
to become a factor artificially boosting or discounting the factual
strength of the causal link, or the extent of the measured impact. It
would open the door to incoherent undershooting, for example, if
defendants were heard to say that an impact is “somewhat less corre-
lated with age, seeing as the factor is a reasonable one”; and it would be
12 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
Opinion of the Court
III
The Court of Appeals majority rejected the affirmative
defense reading and arrived at its position on the burden
of proof question by a different route: because it read our
decision in City of Jackson as ruling out the so-called
“business necessity” enquiry in ADEA cases, the court
concluded that the RFOA defense “replaces” it and there-
fore must conform to its burden of persuasion resting on
the complaining party. But the court’s premise (that City
of Jackson modified the “business necessity” enquiry) is
mistaken; this alone would be reason enough to reject its
approach. And although we are now satisfied that the
business necessity test should have no place in ADEA
disparate-impact cases, we agree with the Government
that this conclusion does not stand in the way of our hold-
ing that the RFOA exemption is an affirmative defense.
See Brief for United States as Amicus Curiae 25–27.
To begin with, when the Court of Appeals further in-
ferred from the City of Jackson reference to Wards Cove
that the Wards Cove burden of persuasion (on the em-
ployee, for the business necessity enquiry) also applied to
the RFOA defense, it gave short shrift to the reasons set
out in Part II–A, supra, for reading RFOA as an affirma-
tive defense (with the burden on the employer). But we
think that even on its own terms, City of Jackson falls
short of supporting the Court of Appeals’s conclusion.
Although City of Jackson contains the statement that
“Wards Cove’s pre-1991 interpretation of Title VII’s identi-
cal language remains applicable to the ADEA,” 544 U. S.,
at 240, City of Jackson made only two specific references
to aspects of the Wards Cove interpretation of Title VII
that might have “remain[ed] applicable” in ADEA cases.
One was to the existence of disparate-impact liability,
——————
overshooting to make them show that the impact is “not correlated with
age, and the factor is reasonable, besides.”
Cite as: 554 U. S. ____ (2008) 13
Opinion of the Court
which City of Jackson explained was narrower in ADEA
cases than under Title VII. The other was to a plaintiff-
employee’s burden of identifying which particular prac-
tices allegedly cause an observed disparate impact, which
is the employee’s burden under both the ADEA and the
pre-1991 Title VII. See 544 U. S., at 241. Neither of these
references, of course, is at odds with the view of RFOA as
an affirmative defense.
If, indeed, City of Jackson’s reference to Wards Cove
could be read literally to include other aspects of the latter
case, beyond what mattered in City of Jackson itself, the
untoward consequences of the broader reading would rule
it out. One such consequence is embraced by Meacham,
who argues both that the Court of Appeals was wrong to
place the burden of persuasion for the RFOA defense on
the employee, and that the court was right in thinking
that City of Jackson adopted the Wards Cove burden of
persuasion on what Meacham views as one element of an
ADEA impact claim. For Meacham takes the position that
an impact plaintiff like himself has to negate business
necessity in order to show that the employer’s actions were
“otherwise prohibited”; only then does the RFOA (with the
burden of persuasion on the employer) have a role to play.
To apply both tests, however, would force the parties to
develop (and the court or jury to follow) two overlapping
enquiries: first, whether the employment practice at issue
(based on a factor other than age) is supported by a busi-
ness justification; and second, whether that factor is a
reasonable one. Depending on how the first enquiry pro-
ceeds, a plaintiff might directly contest the force of the
employer’s rationale, or else try to show that the employer
invoked it as a pretext by pointing (for example) to alter-
native practices with less of a disparate impact. See
Wards Cove, 490 U. S., at 658 (“first, a consideration of the
justifications an employer offers for his use of these prac-
tices; and second, the availability of alternative practices
14 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
Opinion of the Court
to achieve the same business ends, with less racial
impact”); see also id., at 658–661. But even if the
plaintiff succeeded at one or the other, in Meacham’s
scheme the employer could still avoid liability by proving
reasonableness.
Here is what is so strange: as the Government says, “[i]f
disparate-impact plaintiffs have already established that a
challenged practice is a pretext for intentional age dis-
crimination, it makes little sense then to ask whether the
discriminatory practice is based on reasonable factors
other than age.” Brief for United States as Amicus Curiae
26 (emphasis in original). Conversely, proving the reason-
ableness defense would eliminate much of the point a
plaintiff would have had for showing alternatives in the
first place: why make the effort to show alternative prac-
tices with a less discriminatory effect (and besides, how
would that prove pretext?), when everyone knows that the
choice of a practice relying on a “reasonable” non-age
factor is good enough to avoid liability?14 At the very
least, developing the reasonableness defense would be
substantially redundant with the direct contest over the
force of the business justification, especially when both
enquiries deal with the same, narrowly specified practice.
It is not very fair to take the remark about Wards Cove in
City of Jackson as requiring such a wasteful and confusing
structure of proof.
Nor is there any good way to read the same line from
City of Jackson as implying that the burden of proving any
business-related defense falls on the plaintiff; most obvi-
ously, this would entail no longer taking the BFOQ clause
——————
14 See City of Jackson, 544 U. S., at 243 (“While there may have been
other reasonable ways for the City to achieve its goals, the one selected
was not unreasonable. Unlike the business necessity test, which asks
whether there are other ways for the employer to achieve its goals that
do not result in a disparate impact on a protected class, the reasonable-
ness inquiry includes no such requirement”).
Cite as: 554 U. S. ____ (2008) 15
Opinion of the Court
to be an affirmative defense, which City of Jackson con-
firmed that it is, see 544 U. S., at 233, n. 3. What is more,
City of Jackson could not have had the RFOA clause in
mind as “identical” to anything in Title VII (for which a
Wards Cove’s reading might be adopted), for that statute
has no like-worded defense. And as Wards Cove did not
purport to construe any statutory defenses under Title
VII, only an over-reading of City of Jackson would find
lurking in it an assumption that Wards Cove has anything
to say about statutory defenses in the ADEA (never mind
one that Title VII does not have).
IV
As mentioned, where City of Jackson did get help from
our prior reading of Title VII was in relying on Wards
Cove to repeat that a plaintiff falls short by merely alleg-
ing a disparate impact, or “point[ing] to a generalized
policy that leads to such an impact.” City of Jackson, 544
U. S., at 241. The plaintiff is obliged to do more: to “iso-
lat[e] and identif[y] the specific employment practices that
are allegedly responsible for any observed statistical dis-
parities.” Ibid. (quoting Wards Cove, supra, at 656; em-
phasis in original; internal quotation marks omitted). The
aim of this requirement, as City of Jackson said, is to
avoid the “result [of] employers being potentially liable for
‘the myriad of innocent causes that may lead to statistical
imbalances.’ ” 544 U. S., at 241 (quoting Wards Cove,
supra, at 657; some internal quotation marks omitted).
And as the outcome in that case shows, the requirement
has bite: one sufficient reason for rejecting the employees’
challenge was that they “ha[d] done little more than point
out that the pay plan at issue [was] relatively less gener-
ous to older workers than to younger workers,” and “ha[d]
not identified any specific test, requirement, or practice
within the pay plan that ha[d] an adverse impact on older
workers.” City of Jackson, supra, at 241.
16 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
Opinion of the Court
Identifying a specific practice is not a trivial burden,
and it ought to allay some of the concern raised by Knolls’s
amici, who fear that recognizing an employer’s burden of
persuasion on an RFOA defense to impact claims will
encourage strike suits or nudge plaintiffs with marginal
cases into court, in turn inducing employers to alter busi-
ness practices in order to avoid being sued. See, e.g., Brief
for General Electric Co. as Amicus Curiae 18–31. It is also
to the point that the only thing at stake in this case is the
gap between production and persuasion; nobody is saying
that even the burden of production should be placed on the
plaintiff. Cf. Schaffer, 546 U. S., at 56 (burden of persua-
sion answers “which party loses if the evidence is closely
balanced”); id., at 58 (“In truth, however, very few cases
will be in evidentiary equipoise”). And the more plainly
reasonable the employer’s “factor other than age” is, the
shorter the step for that employer from producing evi-
dence raising the defense, to persuading the factfinder
that the defense is meritorious. It will be mainly in cases
where the reasonableness of the non-age factor is obscure
for some reason, that the employer will have more evi-
dence to reveal and more convincing to do in going from
production to persuasion.
That said, there is no denying that putting employers to
the work of persuading factfinders that their choices are
reasonable makes it harder and costlier to defend than if
employers merely bore the burden of production; nor do we
doubt that this will sometimes affect the way employers do
business with their employees. But at the end of the day,
amici’s concerns have to be directed at Congress, which set
the balance where it is, by both creating the RFOA exemp-
tion and writing it in the orthodox format of an affirmative
defense. We have to read it the way Congress wrote it.
* * *
As we have said before, Congress took account of the
Cite as: 554 U. S. ____ (2008) 17
Opinion of the Court
distinctive nature of age discrimination, and the need to
preserve a fair degree of leeway for employment decisions
with effects that correlate with age, when it put the RFOA
clause into the ADEA, “significantly narrow[ing] its cover-
age.” City of Jackson, 544 U. S., at 233. And as the out-
come for the employer in City of Jackson shows, “it is not
surprising that certain employment criteria that are rou-
tinely used may be reasonable despite their adverse im-
pact on older workers as a group.” Id., at 241. In this
case, we realize that the Court of Appeals showed no
hesitation in finding that Knolls prevailed on the RFOA
defense, though the court expressed its conclusion in
terms of Meacham’s failure to meet the burden of persua-
sion. Whether the outcome should be any different when
the burden is properly placed on the employer is best left
to that court in the first instance. The judgment of the
Court of Appeals is vacated, and the case is remanded for
further proceedings consistent with this opinion.
It is so ordered.
JUSTICE BREYER took no part in the consideration or
decision of this case.
Cite as: 554 U. S. ____ (2008) 1
SCALIA, J., concurring in judgment
SUPREME COURT OF THE UNITED STATES
_________________
No. 06–1505
_________________
CLIFFORD B. MEACHAM, ET AL., PETITIONERS v.
KNOLLS ATOMIC POWER LABORATORY,
AKA KAPL, INC., ET AL.
ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF
APPEALS FOR THE SECOND CIRCUIT
[June 19, 2008]
JUSTICE SCALIA, concurring in the judgment.
I do not join the majority opinion because the Court
answers for itself two questions that Congress has left to
the sound judgment of the Equal Employment Opportu-
nity Commission. As represented by the Solicitor General
of the United States in a brief signed by the Commission’s
General Counsel, the Commission takes the position that
the reasonable-factor-other-than-age provision is an af-
firmative defense on which the employer bears the burden
of proof, and that, in disparate-impact suits brought under
the Age Discrimination in Employment Act of 1967
(ADEA), that provision replaces the business-necessity
test of Wards Cove Packing Co. v. Atonio, 490 U. S. 642
(1989).
Neither position was contrived just for this case. In-
deed, the Commission has arguably held its view on the
burden-of-proof point for nearly 30 years. See 44 Fed.
Reg. 68858, 68861 (1979). Although its regulation applied
only to cases involving “discriminatory treatment,” 29
CFR §1625.7(e) (2007), even if that covers only disparate
treatment, see ante, at 7–8, n. 9, the logic of its extension
to disparate-impact claims is obvious and unavoidable.
See Brief for United States as Amicus Curiae 16, n. 1. At
the very least, the regulation does not contradict the
2 MEACHAM v. KNOLLS ATOMIC POWER LABORATORY
SCALIA, J., concurring in judgment
Commission’s current position: It does not say that the
employer bears the burden of proof only in discriminatory-
treatment cases.
The Commission’s view on the business-necessity test is
newly minted, but that does not undermine it. The Com-
mission has never expressed the contrary view that the
factfinder must consider both business necessity and
reasonableness when an employer applies a factor that
has a disparate impact on older workers. In fact, before
Smith v. City of Jackson, 544 U. S. 228 (2005), the Com-
mission had not even considered the relationship between
the two standards, because it used to treat the two as
identical. See 29 CFR §1625.7(d). After City of Jackson
rejected that equation, see 544 U. S., at 243, the Commis-
sion decided that the business-necessity standard plays no
role in ADEA disparate-impact claims, see Brief for
United States as Amicus Curiae 25–27, and has even
proposed new rules setting forth that position, see 73 Fed.
Reg. 16807–16809 (2008).
Because administration of the ADEA has been placed in
the hands of the Commission, and because the agency’s
positions on the questions before us are unquestionably
reasonable (as the Court’s opinion ably shows), I defer to
the agency’s views. See Raymond B. Yates, M. D., P. C.
Profit Sharing Plan v. Hendon, 541 U. S. 1, 24–25 (2004)
(SCALIA, J., concurring in judgment). I therefore concur in
the Court’s judgment to vacate the judgment of the Court
of Appeals.
Cite as: 554 U. S. ____ (2008) 1
Opinion of THOMAS, J.
SUPREME COURT OF THE UNITED STATES
_________________
No. 06–1505
_________________
CLIFFORD B. MEACHAM, ET AL., PETITIONERS v.
KNOLLS ATOMIC POWER LABORATORY,
AKA KAPL, INC., ET AL.
ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF
APPEALS FOR THE SECOND CIRCUIT
[June 19, 2008]
JUSTICE THOMAS, concurring in part and dissenting in
part.
I write separately to note that I continue to believe that
disparate-impact claims are not cognizable under the Age
Discrimination in Employment Act of 1967, 29 U. S. C.
§621 et seq. See Smith v. City of Jackson, 544 U. S. 228,
247–268 (2005) (O’Connor, J., joined by KENNEDY and
THOMAS, JJ., concurring in judgment). Moreover, I dis-
agree with the Court’s statement that the “reasonable
factors other than age” (RFOA) exception, §623(f)(1), is
principally relevant in disparate-impact cases. Compare
City of Jackson, supra, at 251–253 (opinion concurring in
judgment), with ante, at 10–11 (citing City of Jackson,
supra, at 239 (plurality opinion)). I therefore join only
Parts I and II–A of the Court’s opinion because I agree
that the RFOA exception is an affirmative defense—when
it arises in disparate-treatment cases. Here, although the
Court of Appeals erred in placing the burden of proof on
petitioners, I would nonetheless affirm because the only
claims at issue are disparate-impact claims.