The prisoner's dilemma (PD) is arguably the most important model of social dilemmas, but our knowledge about how a PD …

and defecting in response to defection) in social dilemmas. In our first study, subjects play eight Sequential Prisoner …'s Dilemma games with varying payoffs. We elicit second mover strategies and find that most second movers conditionally cooperate …

a repeated prisoner's dilemma game. We find that already children aged 3 act in a conditionally cooperative way. Yet …

population composed of Nash agents and Epictetusian agents matched randomly and interacting in the prisoner's dilemma game. It is …