, despite the absence of free-riding incentives. In a laboratory experiment, subjects indeed under-contribute relative to …

players expend significantly higher efforts than predicted by theory. In best-shot contests, where group performance depends …

.Bicchieri, The Grammar of Society. CambridgeUP [2006]), I develop a behavioral theory of norm conformity building on the Battigalli …-Dufwenberg “psychological” framework (P.Battigalli and M.Dufwenberg, Dynamic Psychological Games, J.Econ.Theory, 144:1-35 [2009]). …

This paper investigates how punishment promotes cooperation when the punishment enforcer is a third party independent … implicated parties are allowed to punish each other, both the cooperation rate and the earnings are lower when the enforcement of …

formation of within-group cooperation is affected by different types and degrees of between-group interactions. We show that … when between-group interactions are of the same directions and weak (strong), within-group cooperation for providing public … the opposite directions or unidirectional, within-group cooperation will necessarily occur. In addition, endogenous …