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, there is contrasting research supporting the idea that...

We introduce a novel approach to studying behavior in repeated games - one that is based on the psychology of play. Our 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...

We introduce a novel approach to studying behavior in repeated games - one that is based on the psychology of play. Our 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...

Exogenously given reputational information is known to improve cooperation. This paper experimentally studies how people create such information through reporting of partner's action choices, and whether the endogenous monitoring helps sustain cooperation, in an indefinitely repeated prisoner's...