Robert J. MacCoun is the James and Patricia Kowal Professor of Law at Stanford Law School., a Professor by courtesy in Stanford's Psychology Department, and a senior fellow at the Freeman Spogli Institute. Trained as a social psychologist, he has published numerous studies on psychoactive drug use and policy, individual and group decision-making, distributive and procedural justice, social influence processes, and bias in the use and interpretation of research evidence by scientists, journalists and citizens.