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 Gc̃hter, 2002). However, the rationale for costly punishment remains unclear. This paper reports the results of an experiment investigating...

This paper considers the effect of status or relative income on work effort combining experimental evidence from a gift-exchange game with ISSP survey data. We find a consistent negative effect of others' incomes on individual effort in both datasets. The individual's rank in the income...