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 …

Cooperation, Prisoner's Dilemma, evolutionary game theory, replicator dynamics, experimental economics, learning …

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 … others. In particular, we disentangle the decision to be a conditional cooperator at all from the strength of conditional …

approach is based on the following six "aspects" of a player's behavior: round-1 cooperation, lenience, forgiveness, loyalty …, leadership, and following. Using a laboratory experiment, we explore how aspects are correlated between each other in a given …

The observability of partners' past play is known to theoretically improve cooperation in an infinitely repeated … prisoner's dilemma game under random matching. This paper presents evidence from an incentivized experiment that reputational … information per se may not improve cooperation. A structural estimation suggests that a certain percentage of players act …