specialized enforcement technology is sufficiently effective, cooperation is best sustained by a "single enforcer punishment …We introduce the possibility of direct punishment by specialized enforcers into a model of community enforcement … following deviations by regular agent is that such actions, by reducing future cooperation, would decrease the amount of …

We study how punishment influences conditional cooperation. We ask two questions: 1) how does conditional cooperation … cooperation with punishment which leads to a decrease in conditional cooperation. The power to punish means more responsibility … change if a subject can be punished and 2) how does conditional cooperation change if a subject has the power to punish …

opportunity for profitable cooperation. Our experimental method creates two groups of subjects who are similar but have different … long-run losses. Initially similar, cooperation rates for groups with different intelligence levels diverge, declining in … groups of lower intelligence, and increasing to reach almost full cooperation levels in groups of higher intelligence …

mediated by differences in cognitive skills. Our design uses a Repeated Prisoner’s Dilemma, and we compare rates of cooperation … higher cooperation rates and profits than in separated groups (with consistent gains among lower IQ subjects and relatively …

mediated by differences in cognitive skills. Our design uses a Repeated Prisoner's Dilemma, and we compare rates of cooperation … higher cooperation rates and profits than in separated groups (with consistent gains among lower IQ subjects and relatively …

Case studies of cartels and recent theory suggest that repeated communication is key for stable cooperation in … understood. We study cooperation under different monitoring and communication structures in the laboratory. Under all monitoring … monitoring, where actions can only be observed with noise, cooperation is stable only when subjects can communicate before every …

initial cooperation rates are similar, it increases in the groups with higher intelligence to reach almost full cooperation … differences in the response to past cooperation of the partner. In higher intelligence subjects, cooperation after the initial … difference is absent. Cooperation of higher intelligence subjects is payoff sensitive, thus not automatic: in a treatment with …