Also known as:discriminatory effects · disparate impact
Written by attorneys · grounded in primary & secondary sources — see below
A measurable disparate impact on a protected class resulting from a facially neutral practice or law. The effect must be shown through statistical evidence or predictable outcomes that burden the group more heavily than others. In equal protection claims the effect alone does not establish a violation without proof of discriminatory purpose.
Sources & Authorities
How it applies
Common Examples
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Veteran Preference Hiring Rule
Dustin Donovan, a female applicant, applies for a state highway job. The state gives absolute hiring preference to veterans, nearly all of whom are men. Although the policy is facially neutral and aimed at rewarding military service, women like Donovan are disproportionately passed over. The court finds no equal protection violation because the purpose is to benefit veterans rather than to disadvantage women.
Single-Sex Military Institute
Dorothy Daniels applies to a state-supported military institute that uses a facially neutral admissions formula based on prior military academy attendance. Because virtually no women have attended those feeder academies, the formula produces a near-total exclusion of female applicants. The court finds the resulting disparate effect insufficient for an equal protection violation absent proof of discriminatory purpose.
Select any source to read its text and confirm it supports the definition.
Cases
Casebooks
Hornbooks
Study Supplements
United States v. Virginia518 U.S. 515, 533 (1996)
Death Penalty Statistical Challenge
Dylan Duffy, a Black defendant sentenced to death, presents statewide data showing Black defendants receive the death penalty more often than white defendants when the victim is white. The statistics demonstrate a discriminatory effect across cases. The court rules that the general effect is insufficient to prove a violation in Duffy's individual case without evidence of purposeful discrimination by the decision-makers in his prosecution.
McCleskey v. Kemp481 U.S. 279 (1987)
Transgender Employee Termination
Delilah Duran, a transgender woman, is fired under a facially neutral policy that terminates any employee whose personnel file contains a birth-certificate mismatch. An otherwise identical employee whose file shows no mismatch keeps the job. The policy produces a discriminatory effect on transgender employees. The court treats the effect as evidence that sex is a but-for cause of the discharge.
Bostock v. Clayton County, Georgia140 S. Ct. 1731, 1739 (2020)
Religious Land Use Restriction
Deborah Dunn's church seeks a permit to expand its building in a residential zone. The city denies the permit under a zoning rule that applies equally to all applicants. The denial creates a discriminatory effect on religious exercise by preventing the church from accommodating its growing congregation. The court examines whether the effect can be remedied through legislation without proof of discriminatory purpose.
City of Boerne v. Flores521 U.S. 507 (1997)
School Funding Disparity
Denise Donovan's children attend a school district funded primarily by local property taxes. Wealthier districts spend far more per pupil than poorer districts, producing markedly lower educational resources for students in low-income areas. The funding scheme generates a discriminatory effect on poorer students. The court holds that the effect alone does not violate equal protection absent proof of purposeful discrimination against a suspect class.
San Antonio Independent School District v. Rodriguez411 U.S. 1, 93 S. Ct. 127, 36 L. Ed. 2d 16 (1973)
Common questions
Frequently Asked
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Does proof of discriminatory effect alone establish an equal protection violation?+
No. Equal protection requires both discriminatory effect and discriminatory purpose. Statistical disparities or disparate outcomes are insufficient without evidence that decision-makers acted with the intent to disadvantage the protected group.
Supporting sources
How does a defendant show discriminatory effect in a selective prosecution claim?+
The defendant must identify similarly situated individuals who committed the same offense but were not prosecuted. Those individuals must lack the protected characteristic alleged to be the basis for the discriminatory charging decision.
Supporting sources
What role does discriminatory effect play under the Fair Housing Act?+
Liability may be established based on a practice's discriminatory effect even without discriminatory intent. A practice has a discriminatory effect when it actually or predictably results in a disparate impact on a protected group or perpetuates segregated housing patterns.
Supporting sources
Can a facially neutral veteran preference policy be challenged solely on the basis of its effect on women?+
No. A policy granting hiring preferences to veterans does not violate equal protection merely because it disproportionately disadvantages women. The purpose must be shown to be discrimination against women rather than the legitimate goal of benefiting veterans.
Supporting sources
521 U.S. 507 (1997)Property
…by a compelling interest and is the least restrictive means of accomplishing that interest. If Congress can prohibit laws with discriminatory effects in order to prevent racial discrimination in violation of the Equal Protection Clause, see Fullilove v. Klutznick , 448 U. S. 448, 477 (1980) (plurality opinion); City of Rome , 446 U.…