We investigate how group boundaries, and the economic environment surrounding groups, affect altruistic cooperation and … harm those who defect, encouraging a norm of cooperation towards the group. Adding competition between groups causes even … stronger in-group cooperation, but also a qualitative change in punishment: punishment becomes antisocial, harming cooperative …

We investigate how group boundaries, and the economic environment surrounding groups, affect altruistic cooperation and … harm those who defect, encouraging a norm of cooperation towards the group. Adding competition between groups causes even … stronger in-group cooperation, but also a qualitative change in punishment: punishment becomes anti-social, harming cooperative …

benefit- fostering unselfish cooperation and norm enforcement within the group-but also whether there is a dark side, in the … willingness to enforce a norm of cooperation towards fellow platoon members. This suggests that the social aspect of organizations …

). In this paper we address this question by using a measure of costly cooperation elicited in a laboratory experiment to … prisoner's dilemma game to measure subjects' preferences for cooperation. The authors observe the same subjects on the job for … the experimenters by giving them some follow-up data. The authors find that individual differences in costly cooperation …

We measure a specific form of other-regarding behavior, costly cooperation with an anonymous other, among 645 subjects … of costly cooperation towards an anonymous other in a setting that does not admit of repeated-game or reputation …-effect explanations. We find that individual differences in costly cooperation observed in the lab do predict individual differences in …