Also known as: disparate impacts · disparate-impact
Written by attorneys · grounded in primary & secondary sources — see below
An adverse effect of a facially neutral practice that disproportionately burdens persons based on race, sex, national origin, age, or disability. Discriminatory intent is not required to establish the effect, though business necessity may justify the practice.
Dominic Drake, a state personnel director, implements a strict lifetime preference for veterans in civil service hiring. Danielle Dixon, a highly qualified female applicant with no military service, is passed over repeatedly. The policy produces a severe statistical imbalance against women. Because the preference was adopted to reward military service rather than to disadvantage women, the disparate impact alone does not establish an equal protection violation.
Dawson Steel requires all applicants for warehouse positions to complete a physical agility test that measures lifting speed and endurance. Derek Douglas, who uses a wheelchair due to a mobility impairment, fails the test at a markedly higher rate than nondisabled applicants. The test is facially neutral and job-related, yet its statistical effect on disabled workers triggers scrutiny under the disparate impact framework.
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Duffy Construction adopts a new evaluation system that weights recent productivity metrics heavily for promotion decisions. Darrell Duncan, a fifty-eight-year-old foreman with decades of experience, receives lower scores than younger peers and is denied advancement. The facially neutral system produces markedly lower promotion rates for workers over fifty-five, raising a potential disparate impact claim under the ADEA.
Decker Electronics maintains a plant-wide seniority system for shift assignments and layoffs. David Dawson, a minority employee hired after the system was established, is repeatedly bumped to less desirable shifts. The neutral rule produces a statistically significant adverse effect on recently hired minority workers, supporting a disparate impact theory under Title VII.
Dixon Foods institutes an aptitude test for management trainee positions that emphasizes quantitative reasoning. Diego Duarte, a Latino applicant, fails the test at a higher rate than non-Latino applicants despite strong work experience. The facially neutral test creates a statistically significant disparate impact on a protected racial group, opening the door to a disparate impact challenge.
Dawson Steel deploys an automated screening algorithm that flags applicants with certain address histories. Danielle Dixon, a Black applicant living in a historically segregated neighborhood, is rejected at a higher rate than White applicants with comparable qualifications. The neutral algorithm produces a measurable disparate impact on a protected racial group, permitting a disparate impact claim.
A plaintiff must identify a specific facially neutral policy or practice and demonstrate through statistical evidence that the policy causes a significantly disproportionate adverse effect on a protected group.
Disparate impact focuses on the effects of a neutral policy without requiring proof of intent, whereas disparate treatment requires evidence that the defendant acted because of a protected characteristic.
Yes. When the purpose is to benefit veterans rather than to discriminate against women, the disparate impact alone does not establish a constitutional violation.
Once a plaintiff establishes a prima facie case, the defendant may rebut by showing that the challenged practice is job-related and consistent with business necessity.
No. Under equal protection doctrine, proof of discriminatory purpose is required. Impact without intent is insufficient.
…v. Davis , 426 U. S. 229, 241 (1976). RFRA's substantial-burden test, however, is not even a discriminatory-effects or disparate-impact test. It is a reality of the modern regulatory state that numerous state laws, such as the zoning regulations at issue here, impose a substantial burden on a large class of individuals.…