A substantive amount of lab experimental evidence suggests that the norm of reciprocity has important economic consequences. However, it is unclear whether the norm of reciprocity survives in a natural and competitive environment with experienced agents. For this purpose we analyze data from a...

One of the key issues for understanding reciprocity is how people evaluate the kindness of an action. In this paper we argue that the motivation driving an action plays an important role for the reciprocating response to that action. We test experimentally the hypothesis that reciprocal behavior...