experiment in two cities in Ghana. Using a public good game with third-party punishment, we find that punisher's age is an … important determinant of cooperation. Our results indicate the elder are more efficient using punishment than youngsters. …

We conduct an artefactual field experiment to study whether the individual preferences and propensity to cooperate of …

questionable whether known solutions to the problem of cooperation, such as punishment could still work, given the limited … optional and compulsory public goods games both with and without a punishment stage. We find that the possibility of opting …-out motivates cooperation. Instead, when punishment is introduced, higher cooperation emerges in the compulsory game. This key …

' purchase decisions (whether to buy, and if so how much to pay) in a natural experiment at an online music store with PWYW …%. The experiment suggests that even low levels of social pressure without face to face interaction on customers leads to a …