Distributive and reciprocal fairness: What can we learn from the heterogeneity of social preferences?

► Subjects' preferences for distributive fairness are categorized using dictator games. ► Nearly three-quarters of participants exhibit concern for distributive fairness. ► Ultimatum and trust games provide evidence on reciprocal fairness. ► Differing prosocial preference types act predictably different in reciprocal games. ► All preference types reveal strong concern for reciprocal fairness.