This paper reports three experiments with triadic or dyadic designs. The experiments include the moonlighting game in which first-mover actions can elicit positively or negatively reciprocal reactions from second movers. First movers can be motivated by trust in positive reciprocity or fear of...

This article addresses four “stylized facts†that summarize data from experimental studies of voluntary contributions to the provision of public goods. Theoretical propositions and testable hypotheses for voluntary contributions are derived from two models of social preferences, the...