We elicit human conditional punishment types by conducting experiments. We find that their punishment decisions to an … individual are on average significantly positively proportional to other members’ punishment decisions to that individual. …

This experiment investigates contests between groups. Each group has one strong player, with a higher valuation for the …

of the implicated parties who propose the punishment. In a prisoner's dilemma experiment, we find an independent third …This paper investigates how punishment promotes cooperation when the punishment enforcer is a third party independent … party vetoes not only punishment to the cooperators but punishment to the defectors as well. Compared with the case when the …

We run an experiment with users of internet message boards. We find that forum users cooperate more with partners of …

with Pareto-ranked equilibria. We report an experiment in which two groups compete in a weakest-link contest by expending …. As a result, intra-group communication decreases while inter-group communication increases payoffs. Our experiment thus …

of member change on performance? To answer these questions we conduct an experiment in which we investigate the effect of … first part of the experiment, and then two members of the group are replaced with new participants, and the newly formed … group plays the game for the second part of the experiment. Our results show that the arrival of newcomers decreases trust …

resulting restrictions in using private information. We report results from a laboratory experiment in which teams were given a …