We examine the welfare effects of a central government's subsidy for a local public good in a Nash equilibrium model with two types of public goods. We first show that the welfare effect depends on the substitution and evaluation effects. We also investigate the optimal subsidy rate in a...

We provide an analysis of odds-improving self-protection for when it yields collective benefits to groups, such as alliances of nations, for whom risks of loss are public bads and prevention of loss is a public good. Our analysis of common risk reduction shows how diminishing returns in risk...