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Full Opinion
delivered the opinion of the Court.
We are presented with one of the most expansive class actions ever. The District Court and the Court of Appeals approved the certification of a class comprising about one and a half million plaintiffs, current and former female employees of petitioner Wal-Mart who allege that the discretion exercised by their local supervisors over pay and promotion matters violates Title VII by discriminating against women. In addition to injunctive and declaratory relief, the plaintiffs seek an award of backpay. We consider whether the certification of the plaintiff class was consistent with Federal Rules of Civil Procedure 23(a) and (b)(2).
I
A
Petitioner Wal-Mart is the Nation's largest private employer. It operates four types of retail stores throughout the country: Discount Stores, Supercenters, Neighborhood Markets, and Sam’s Clubs. Those stores are divided into seven nationwide divisions, which in turn comprise 41 regions of 80 to 85 stores apiece. Each store has between 40 and 53 separate departments and 80 to 500 staff positions. In all, Wal-Mart operates approximately 3,400 stores and employs more than 1 million people.
Promotions work in a similar fashion. Wal-Mart permits store managers to apply their own subjective criteria when selecting candidates as “support managers,” which is the first step on the path to management. Admission to Wal-Mart’s management training program, however, does require that a candidate meet certain objective criteria, including an above-average performance rating, at least one year’s tenure in the applicant’s current position, and a willingness to relocate. But except for those requirements, regional and district managers have discretion to use their own judgment when selecting candidates for management training. Promotion to higher office — e. g., assistant manager, co-manager, or store manager — is similarly at the discretion of the employee’s superiors after prescribed objective factors are satisfied.
B
The named plaintiffs in this lawsuit, representing the 1.5 million members of the certified class, are three current or former Wal-Mart employees who allege that the company discriminated against them on the basis of their sex by denying them equal pay or promotions, in violation of Title VII of the Civil Rights Act of 1964, 78 Stat. 255, as amended, 42 U. S. C. § 2000e~l et seq.
Christine Kwapnoski has worked at Sam’s Club stores in Missouri and California for most of her adult life. She has held a number of positions, including a supervisory position. She claims that a male manager yelled at her frequently and screamed at female employees, but not at men. The manager in question “told [her] to ‘doll up,’ to wear some makeup, and to dress a little better.” App. 1003a.
The final named plaintiff, Edith Arana, worked at a Wal-Mart store in Duarte, California, from 1995 to 2001. In 2000, she approached the store manager on more than one occasion about management training, but was brushed off. Arana concluded she was being denied opportunity for advancement because of her sex. She initiated internal complaint procedures, whereupon she was told to apply directly to the district manager if she thought her store manager was being unfair. Arana, however, decided against that and never applied for management training again. In 2001, she was fired for failure to comply with Wal-Mart’s timekeeping policy.
These plaintiffs, respondents here, do not allege that Wal-Mart has any express corporate policy against the advancement of women. Rather, they claim that their local managers’ discretion over pay and promotions is exercised disproportionately in favor of men, leading to an unlawful disparate impact on female employees, see 42 U. S. C.
Importantly for our purposes, respondents claim that the discrimination to which they have been subjected is common to all Wal-Mart’s female employees. The basic theory of their case is that a strong and uniform “corporate culture” permits bias against women to infect, perhaps subconsciously, the discretionary decisionmaking of each one of Wal-Mart’s thousands of managers — thereby making every woman at the company the victim of one common discriminatory practice. Respondents therefore wish to litigate the Title VII claims of all female employees at Wal-Mart’s stores in a nationwide class action.
C
Class certification is governed by Federal Rule of Civil Procedure 23. Under Rule 23(a), the party seeking certification must demonstrate, first, that
“(1) the class is so numerous that joinder of all members is impracticable;
“(2) there are questions of law or fact common to the class;
“(3) the claims or defenses of the representative parties are typical of the claims or defenses of the class; and
“(4) the representative parties will fairly and adequately protect the interests of the class.”
Second, the proposed class must satisfy at least one of the three requirements listed in Rule 23(b). Respondents rely on Rule 23(b)(2), which applies when “the party opposing the class has acted or refused to act on grounds that apply generally to the class, so that final injunctive relief or correspond
Invoking these provisions, respondents moved the District Court to certify a plaintiff class consisting of “ ‘[a]ll women employed at any Wal-Mart domestic retail store at any time since December 26,1998 who have been or may be subjected to Wal-Mart’s challenged pay and management track promotions policies and practices.’” 222 F. R. D., at 141-142 (quoting Plaintiff’s Motion for Class Certification in Case No. 3:01-cv-02252-CRB (ND Cal), Doc. 99, p. 37). As evidence that there were indeed “questions of law or fact common to” all the women of Wal-Mart, as Rule 23(a)(2) requires, respondents relied chiefly on three forms of proof: statistical evidence about pay and promotion disparities between men and women at the company, anecdotal reports of discrimination from about 120 of Wal-Mart’s female employees, and the testimony of a sociologist, Dr. William Bielby, who conducted a “social framework analysis” of Wal-Mart’s “culture” and personnel practices, and concluded that the company was “vulnerable” to gender discrimination. 603 F. 3d 671, 601 (CA9 2010) (en banc).
Wal-Mart unsuccessfully moved to strike much of this evidence. It also offered its own countervailing statistical and other proof in an effort to defeat Rule 23(a)’s requirements
D
A divided en banc Court of Appeals substantially affirmed the District Court’s certification order. 603 F. 3d 571. The majority concluded that respondents’ evidence of commonality was sufficient to “raise the common question whether Wal-Mart’s female employees nationwide were subjected to a single set of corporate policies (not merely a number of independent discriminatory acts) that may have worked to unlawfully discriminate against them in violation of Title VII.” Id., at 612 (emphasis deleted). It also agreed with the District Court that the named plaintiffs’ claims were sufficiently typical of the class as a whole to satisfy Rule 23(a)(3), and that they could serve as adequate class representatives, see Rule 23(a)(4). Id., at 614-615. With respect to the Rule 23(b)(2) question, the Ninth Circuit held that respondents’ backpay claims could be certified as part of a (b)(2) class because they did not “predominare]” over the requests for declaratory and injunctive relief, meaning they were not “superior in strength, influence, or authority” to
Finally, the Court of Appeals determined that the action could be manageably tried as a class action because the District Court could adopt the approach the Ninth Circuit approved in Hilao v. Estate of Marcos, 103 F. 3d 767, 782-787 (1996). There compensatory damages for some 9,541 class members were calculated by selecting 137 claims at random, referring those claims to a special master for valuation, and then extrapolating the validity and value of the untested claims from the sample set. See 603 F. 3d, at 625-626. The Court of Appeals “s[aw] no reason why a similar procedure to that used in Hilao could not be employed in this case.” Id., at 627. It would allow Wal-Mart “to present individual defenses in the randomly selected 'sample cases,’ thus revealing the approximate percentage of class members whose unequal pay or nonpromotion was due to something other than gender discrimination.” Ibid., n. 56 (emphasis deleted).
We granted certiorari. 562 U. S. 1091 (2010).
1 — <
The class action is “an exception to the usual rule that litigation is conducted by and on behalf of the individual named parties only.” Califano v. Yamasaki, 442 U. S. 682, 700-701 (1979). In order to justify a departure from that rule, “a class representative must be part of the class and 'possess the same interest and suffer the same injury’ as the
A
The crux of this case is commonality — the rule requiring a plaintiff to show that “there are questions of law or fact common to the class.” Rule 23(á)(2).
“What matters to class certification ... is not the raising of common ‘questions’ — even in droves — but, rather, the capacity of a class-wide proceeding to generate common answers apt to drive the resolution of the litigation. Dissimilarities within the proposed class are what have the potential to impede the generation of common answers.” Nagareda, supra, at 132.
Rule 23 does not set forth a mere pleading standard. A party seeking class certification must affirmatively demonstrate his compliance with the Rule — that is, he must be prepared to prove that there are in fact sufficiently numerous parties, common questions of law or fact, etc. We recognized in Falcon that “sometimes it may be necessary for the court to probe behind the pleadings before coming to rest on the certification question,” 457 U. S., at 160, and that certification is proper only if “the trial court is satisfied, after a
In this case, proof of commonality necessarily overlaps with respondents’ merits contention that Wal-Mart engages in a pattern or practice of discrimination.
B
This Court’s opinion in Falcon describes how the commonality issue must be approached. There an employee who claimed that he was deliberately denied a promotion on account of race obtained certification of a class comprising all employees wrongfully denied promotions and all applicants wrongfully denied jobs. 457 U. S., at 152. We rejected that composite class for lack of commonality and typicality, explaining:
“Conceptually, there is a wide gap between (a) an indi- . vidual’s claim that he has been denied a promotion [or*353 higher pay] on discriminatory grounds, and his otherwise unsupported allegation that the company has a policy of discrimination, and (b) the existence of a class of persons who have suffered the same injury as that individual, such that the individual’s claim and the class claims will share common questions of law or fact and that the individual's claim will be typical of the class claims.” Id., at 157-158.
Falcon suggested two ways in which that conceptual gap might be bridged. First, if the employer “used a biased testing procedure to evaluate both applicants for employment and incumbent employees, a class action on behalf of every applicant or employee who might have been prejudiced by the test clearly would satisfy the commonality and typicality requirements of Rule 23(a).” Id., at 159, n. 15. Second, “[significant proof that an employer operated under a general policy of discrimination conceivably could justify a class of both applicants and employees if the discrimination manifested itself in hiring and promotion practices in the same general fashion, such as through entirely subjective de-cisionmaking processes.” Ibid. We think that statement precisely describes respondents’ burden in this case. The first manner of bridging the gap obviously has no application here; Wal-Mart has no testing procedure or other company-wide evaluation method that can be charged with bias. The whole point of permitting discretionary decisionmaking is to avoid evaluating employees under a common standard.
The second manner of bridging the gap requires “[significant proof” that Wal-Mart “operated under a general policy of discrimination.” That is entirely absent here. Wal-Mart’s announced policy forbids sex discrimination, see App. 1567a-1596a, and as the District Court recognized the company imposes penalties for denials. of equal employment opportunity, 222 F. R. D., at 154. The only evidence of a “general policy of discrimination” respondents produced was the testimony of Dr. William Bielby, their sociological
C
The only corporate policy that the plaintiffs’ evidence convincingly establishes is Wal-Mart’s “policy” of allowing discretion by local supervisors over employment matters. On its face, of course, that is just the opposite of a uniform employment practice that would provide the commonality needed for a class action; it is a policy against having uniform employment practices. It is also a very common and presumptively reasonable way of doing business — one that we have said “should itself raise no inference of discriminatory conduct,” Watson v. Fort Worth Bank & Trust, 487 U. S. 977, 990 (1988).
To be sure, we have recognized that, “in appropriate cases,” giving discretion to lower-level supervisors can be the basis of Title VII liability under a disparate-impact theory — since “an employer's undisciplined system of subjective decisionmaking [can have] precisely the same effects as a system pervaded by impermissible intentional discrimination.” Id., at 990-991. But the recognition that this type of Title VII claim “can” exist does not lead to the conclusion that every employee in a company using a system of discretion has such a claim in common. To the contrary, left to their own devices most managers in any corporation — and surely most managers in a corporation that forbids sex discrimination — would select sex-neutral, performance-based criteria for hiring and promotion that produce no actionable disparity at all. Others may choose to reward various attributes that produce disparate impact — such as scores on general aptitude tests or educational achievements, see Griggs v. Duke Power Co., 401 U. S. 424, 431-432 (1971). And still other managers may be guilty of intentional discrimination that produces a sex-based disparity. In such a company, demonstrating the invalidity of one manager’s use
Respondents have not identified a common mode of exercising discretion that pervades the entire company — aside from their reliance on Dr. Bielby’s social-framework analysis that we have rejected. In a company of Wal-Mart’s size and geographical scope, it is quite unbelievable that all managers would exercise their discretion in a common way without some common direction. Respondents attempt to make that showing by means of statistical and anecdotal evidence, but their evidence falls well short.
The statistical evidence consists primarily of regression analyses performed by Dr. Richard Drogin, a statistician, and Dr. Marc Bendick, a labor economist. Drogin conducted his analysis region by region, comparing the number of women promoted into management positions with the percentage of women in the available pool of hourly workers. After considering regional and national data, Drogin concluded that “there are statistically significant disparities between men and women at Wal-Mart . . . [and] these disparities . . . can be explained only by gender discrimination.” 603 F. 3d, at 604 (internal quotation marks omitted). Bendick compared work-force data from Wal-Mart and competitive retailers and concluded that Wal-Mart “promotes a lower percentage of women than its competitors.” Ibid.
Even if they are taken at face value, these studies are insufficient to establish that respondents’ theory can be proved on a elasswide basis. In Falcon, we held that one named plaintiff’s experience of discrimination was insufficient to infer that “discriminatory treatment is typical of [the employer’s employment] practices.” 457 U. S., at 158. A similar failure of inference arises here. As Judge Ikuta observed in her dissent, “[information about disparities at the regional and national level does not establish the existence
There is another, more fundamental, respect in which respondents’ statistical proof fails. Even if it established (as it does not) a pay or promotion pattern that differs from the nationwide figures or the regional figures in all' of Wal-Mart’s 3,400 stores, that would still not demonstrate that commonality of issue exists. Some managers will claim that the availability of women, or qualified women, or interested women, in their stores’ area does not mirror the national or regional statistics. And almost all of them will claim to have been applying some sex-neutral, performance-based criteria — whose nature and effects will differ from store to store. In the landmark case of ours which held that giving discretion to lower-level supervisors can be the basis of Title VII liability under a disparate-impact theory, the plurality opinion conditioned that holding ón the corollary that merely proving that the discretionary system has produced a racial or sexual disparity is not enough. “The plaintiff must begin by identifying the specific employment practice that is challenged.” Watson, supra, at 994; accord, Wards Cove Packing Co. v. Atonio, 490 U. S. 642, 656 (1989) (approving that statement), superseded by statute on other grounds, 42 U. S. C. § 2000e-2(k). That is all the more necessary when a class of plaintiffs is sought to be certified. Other than the bare existence of delegated discretion, respondents have identified no “specific employment practice” — much less one that ties all their 1.5 million claims together. Merely showing that Wal-Mart’s policy of discretion has produced an overall sex-based disparity does not suffice.
In sum, we agree with Chief Judge Kozinski that the members of the class
“held a multitude of jobs, at different levels of Wal-Mart’s hierarchy, for variable lengths of time, in 3,400 stores, sprinkled acroos 50 statec, with a kaleidoscope of supervisors (male and female), subject to a variety of*360 regional policies that all differed .... Some thrived while others did poorly. They have little in common but their sex and this lawsuit.” 603 F. 3d, at 652 (dissenting opinion).
Ill
We also conclude that respondents’ claims for backpay were improperly certified under Federal Rule of Civil Procedure 23(b)(2). Our opinion in Ticor Title Ins. Co. v. Brown, 511 U. S. 117, 121 (1994) (per curiam), expressed serious doubt about whether claims for monetary relief may be certified under that provision. We now hold that they may not, at least where (as here) the monetary relief is not incidental to the injunctive or declaratory relief.
A
Rule 23(b)(2) allows class treatment when “the party opposing the class has acted or refused to act on grounds that apply generally to the class, so that final injunctive relief or corresponding declaratory relief is appropriate respecting the class as a whole.” One possible reading of this provision is that it applies only to requests for such injunctive or declaratory relief and does not authorize the class certification of monetary claims at all. We need not reach that broader question in this case, because we think that, at a minimum, claims for individualized relief (like the backpay at issue here) do not satisfy the Rule. The key to the (b)(2) class is “the indivisible nature of the injunctive or declaratory remedy warranted — the notion that the conduct is such that it can be enjoined or declared unlawful only as to all of the class members or as to none of them.” Nagareda, 84 N. Y. U. L. Rev., at 132. In other words, Rule 23(b)(2) applies only when a single injunction or declaratory judgment would provide relief to each member of the class. It does not authorize class certification when each individual class member would be entitled to a different injunction or declaratory judgment against the defendant. Similarly, it does not
That interpretation accords with the history of the Rule. Because Rule 23 “stems from equity practice” that predated its codification, Amchem, Products, Inc. v. Windsor, 521 U. S. 591, 613 (1997), in determining its meaning we have previously looked to the historical models on which the Rule was based, Ortiz v. Fibreboard Corp., 527 U. S. 815, 841-845 (1999). As we observed in Amchem, “[c]ivil rights cases against parties charged with unlawful, class-based discrimination are prime examples” of what (b)(2) is meant to capture. 521 U. S., at 614. In particular, the Rule reflects a series of decisions involving challenges to racial segregation — conduct that was remedied by a single classwide order. In none of the cases cited by the Advisory Committee as examples of (b)(2)’s antecedents did the plaintiffs combine any claim for individualized relief with their classwide injunction. See Advisory Committee’s Note, 28 U. S. C. App., pp. 1260-1261 (1964 ed., Supp. II) (citing cases); e. g., Potts v. Flax, 313 F. 2d 284, 289, n. 5 (CA5 1963); Brunson v. Board of Trustees of School Dist. No. 1, Clarendon Cty., 311 F. 2d 107, 109 (CA4 1962) (per curiam); Frasier v. Board of Trustees of Univ. of N. C., 134 F. Supp. 589, 593 (MDNC 1955) (three-judge court), aff’d, 350 U. S. 979 (1956) (per curiam).
Permitting the combination of individualized and class-wide relief in a (b)(2) class is also inconsistent with the structure of Rule 23(b). Classes certified trader (b)(1) and (b)(2) share the most traditional justifications for class treatment— that individual adjudications would be impossible or unworkable, as in a (b)(1) class,
Given that structure, we think it clear that individualized monetary claims belong in Rule 23(b)(3). The procedural protections attending the (b)(3) class — predominance, superiority, mandatory notice, and the right to opt out — are missing from (b)(2) not because the Rule considers them unnecessary, but because it considers them unnecessary to a (b)(2) class. When a class seeks an indivisible injunction benefiting all its members at once, there is no reason to undertake a case-specific inquiry into whether class issues predominate or whether class action is a superior method of adjudicating