punishment behavior. Our study uses experiments conducted with 525 officers in the Swiss Army, and exploits random assignment to … prisoner's dilemma game with in-group as opposed to out-group members. They also use a costly punishment option to selectively … stronger in-group cooperation, but also a qualitative change in punishment: punishment becomes antisocial, harming cooperative …

This paper introduces new experimental designs to enrich understanding of conditional cooperation and punishment in … public good games. The key to these methods is to elicit complete contribution or punishment profiles using the strategy … contribute more unequally. Contingent punishment strategies are found to increase with decreasing contributions by the target …

and privileged groups with and without decentralized punishment. We find that compared to normal groups, privileged groups … are relatively ineffective in using costly sanctions to increase everyone's contributions. Punishment is less targeted …