bear a higher burden of punishment costs than non-police subjects. When the norm enforcement institution is endogenous, all …

We test whether humans are intuitively inclined to cooperate with or punish strangers using a natural field experiment … pressure can increase rates of punishment. We discuss our results with respect to findings in the lab on cognitive models of …

potential mechanisms through which these letters may affect fine compliance and present results from a natural field experiment …

. To this end, we conduct a repeated public goods experiment with and without punishment using samples from the laboratory … and the online platform Amazon Mechanical Turk. We chose to replicate this experiment because it is long and logistically … interactive experimentation. We find that basic behavioral patterns of cooperation and punishment in the laboratory are replicable …

refugee populations can cooperate harmoniously. We conduct a lab-in-the-field experiment in Lebanon studying intra- and inter …-group behavior of Syrian refugees and Lebanese nationals in a repeated public good game without and with punishment. We find that …

and indirect reciprocity as well as third-party punishment – emerges earliest as an effective means to increase … cooperation in a repeated prisoner's dilemma game. We find that third-party punishment exhibits a strikingly positive effect on … cooperation rates by doubling them in comparison to a control condition. It promotes cooperative behavior even before punishment …

participants in an experiment. Our results suggest that Basu's "Republic of Beliefs" idea provides a critical insight in policy …