Why do money and markets crowd out co-operative relations? This paper characterises the effects of intertemporal preferences, money, and markets on players' ability to co-operate in material-payoff supergames. Players' aversion to intertemporal substitution facilitates co-operation by decreasing...

This paper summarizes the results from public goods experiments investigating the effect of nonbinding agreements on cooperation. Unlike previous studies, this experimental study was conducted among members of forest user groups in Ethiopia and Nepal with long histories of social...