Cooperation among people who are not related to each other is sustained by the availability of punishment devices which help enforce social norms (Fehr and Gächter, 2002). However, the rationale for costly punishment remains unclear. This paper reports the results of an experiment investigating...

This paper reports the results of an experiment that investigates the relationships between inequality and punishment. In particular, we analyze how inter-personal comparisons affect altruistic punishment behavior. In addition, we examine how punishment affects inequality over time. We compare...