This paper presents a model of private provision of a public good where individuals in a group have altruistic preferences and care about the private and public good consumption of the other members of the group. I show that increasing the level of altruism increases the Nash level of the public...

Using data from a laboratory experiment, I study how contributions to a publicgood are affected when subjects face uncertainty regarding the benefit from thepublic good. In addition, I contrast the case when subjects differ in the benefitthey get from a public good with when the benefit is...