Evolution of cooperation has traditionally been studied by assuming that individuals adopt either of two pure … strategies, to cooperate or defect. Recent work has considered continuous cooperative investments, turning full cooperation and … promotes the evolution of cooperation, our investigation gives a comprehensive picture of how relatedness affects the evolution …

Evolution of cooperation by reciprocity has been studied using two-player and n-player repeated prisoner’s dilemma … cooperation when less generous, and better at maintaining a long-term cooperation in the presence of rare defectors when more …

factors that are known to affect cooperation levels, and in so doing replicate and extend previous empirical research on …

Previous research on cooperation has primarily focused on egalitarian interactions, overlooking a fundamental feature …-group conflict, individuals who possess high rank or power tend to show less cooperation. How, then, is cooperation achieved within … cooperation and strategies, such as punishment and gossip, to promote cooperation in social dilemmas. In two studies involving …

from one continuation probability to the other. When switching from large to small, transient higher levels of cooperation … are observed in the early games of the small continuation set. Conversely, when switching from small to large, cooperation … probabilities. These asymmetries suggest a bias in favor of cooperation. Finally, we examine the link between altruism and RPD play …