Before revision:  Study 1 (N= 1,077 ) shows that people do not discriminate between genders when they are in charge of punishing (rewarding ) defectors (cooperators) in a one-shot public goods game. In this study, punishment/reward is implemented by asking participants whether they want to pay a cost to decrease/increase the payoff of a defector/cooperator . Study 2 (N=253) extends Study 1 to a different method of punishing/rewarding ;
After revision:  Study 1 (N= 1,077 ) shows that people do not discriminate between genders when they are in charge of punishing (rewarding ) defectors (cooperators) in a one-shot prisoner's dilemma with third-party punishment/reward is implemented by asking participants whether they want to pay a cost to decrease/increase the payoff of a defector/cooperator . Study 2 (N=253) extends Study 1 to a different method of punishing/rewarding ;