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Toward A Coherent Test For Disparate Impact Discrimination, Jennifer L. Peresie

Indiana Law Journal

Statistics are generally plaintiffs' primary evidence in establishing a prima facie case of disparate impact discrimination. Thus, the use, or misuse, of statistics dictates case outcomes. Lacking a coherent test for disparate impact, courts choose between the two prevailing tests, statistical significance and the four-fifths rule, in deciding cases, and these tests frequently produce opposite results. Litigants thus face considerable uncertainty and the risk that a judge's preferred outcome will dictate which test is applied. This Article recognizes that the two tests perform complementary functions that both play a useful role in determining whether liability should be imposed. statistical significance …