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. …

results of an experiment administered in the United States reported by Alm, Jackson and McKee (1992). The results for both …

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

This paper provides evidence that free riders are heavily punished even if punishment is costly and does not provide … punished. As a consequence, the existence of an opportunity for costly punishment causes a large increase in cooperation levels … because potential free riders face a credible threat. We show, in particular, that in the presence of a costly punishment …

voluntary provision of public goods. In our one-shot experiment, we find that coordination often fails and exogenously imposed …. We test if thresholds perform better if they are endogenously chosen, i.e. if a threshold is approved in a referendum …

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