The cultures of law and social science differ markedly as to the kinds of truth they pursue. Law is deductive, presenting its findings as certainties; social science is largely inductive, presenting its conclusions as subject to revision and contingency. Yet the legal community traditionally draws at will and unsystematically on the findings of social science, sometimes with unfortunate results. The authors of this study explore this issue by focusing on the manner in which the United States Supreme Court uses social science data in reaching its decisions. Concentrating on decisions involving...