There is a formal equivalence between games, societies, and economies. Lindahl equilibrium for a game or society corresponds to competitive equilibrium for the equivalent economy. Results on existence and optimality of competitive equilibrium thus apply to the theory of games and societies. The...

We study three different models in which public goods are supplied by private contributions. In one of these models, tax-financed government subsidies to private contributions will definitely increase the equilibrium supply of public goods. In the other two models, government subsidies are...