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 …

cooperation in the presence of "multi-directedness," whereby people's preferences depend on their psychological motives. People …

hampers cooperation, as higher intelligence players are less cooperative once they are made aware that they play against …

We study the stability of voluntary cooperation in response to varying rates at which a group grows. Using a laboratory … cooperation. We then study the effect on cooperation of exogenously varying rates of entry. Slow growth yields higher cooperation … endogenous growth generally also produces high cooperation levels, growth stalls at intermediate group sizes, leaving potential …

We study how punishment influences conditional cooperation. We ask two questions: 1) how does conditional cooperation … change if a subject can be punished and 2) how does conditional cooperation change if a subject has the power to punish … cooperation. We find that the possibility of being punished increases the strength of conditional cooperation. At the same time …

We characterize 'Games of Altruistic Cooperation' as a class of games in which cooperation leaves the individual and … and/or communication support altruistic cooperation to sustain the welfare of future generations. Without punishment or … communication, cooperation is low; communication alone even increases the incidence of zero contributions. However, combining peer …