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...

The private and the social functions of contracts and of contract law are examined in this entry. In section 1, on the basic theory of contracts, the topics considered include contract formation, why contract enforcement is valuable, the incompleteness of contracts, the interpretation of...