Until recently, theorists considering the evolution of human cooperation have paid little attention to institutional … maximize compliance? We investigate this question by modeling the co-evolution of law and cooperation in a public goods game …' updating of their contribution strategy and observe the effect on Citizen cooperation. We find that when States have unlimited …

We study the effect of group size on cooperation in voluntary contribution mechanism games. As in previous experiments … find that cooperation is highest of all in twoperson groups. The findings in the high MPCR condition are consistent with … those from n-person prisoner's dilemma and oligopoly experiments that suggest it is more difficult to sustain cooperation in …

Existing research supports two opposing mechanisms through which positive mood might affect cooperation. Some studies … have suggested that positive mood produces more altruistic, open and helpful behavior, fostering cooperation. However … reduced use of information, hampering cooperation. We find evidence that suggests the second hypothesis dominates when playing …

interaction impacts cooperation within groups and surplus distribution. We developed and tested experimentally a Surplus … Allocation Game where cooperation of four agents is needed to produce surplus, but only two have the power to allocate it among … distributors and receivers. While behavior at the group level is diverse for surplus allocation and amount of cooperation …

artificial intelligence may or may not be cooperative. We study the deter-minants and forms of algorithmic cooperation in the … prisoner’s dilemma games played by humans in the lab. We find that the same factors that increase human cooperation largely … also determine the cooperation rates of algorithms. However, algorithms tend to play different strategies than humans …

beliefs with experience are central to understanding behavior and learning in the IRPD. Beliefs strongly predict cooperation …

While inequality in resource endowments has been shown to affect cooperation levels in groups, much of this evidence … payoff-irrelevant inequality in resources between groups on cooperation within equal groups. When all groups are poor or rich …