This article combines Monahan and Walker's classification of social facts, social authority, and social frameworks with political-institutionalism's view of law and science as competing institutional logics to explain how, and with what consequences, employment discrimination law and industrial-organizational (I-O) psychology became co-produced. When social science is incorporated into enforcement of legislative law as social authority—rationale for judicial rule making—law's institutional logic of relying on precedent and reasoning by analogy ensures that social science will have ongoing influence on law's development. By helping set research agendas and providing new professional opportunities, institutionalized legal doctrine shapes social science knowledge. But because of differences in institutional logic, wherein legal cumulation is backward looking whereas scientific cumulation is forward looking, co-production of law and science may produce institutional mismatch between legal doctrine and scientific knowledge.