We develop a model of common agency with complete information and general preferences with non-transferable utility, and prove that the principals'Nash equilibrium in truthful strategies implements an efficient action. We apply this theory to construct a positive model of public finance, where...

We examine the growth promoting roles of R&D, international R&D spillovers, and trade in a world econometric model.

We study the politics of intergenerational redistribution in an overlapping-generations model with short-lived governements. The successive governements -who care about the welfare of the currently living generations and possibly about campaign contributions- are unable to pre-commit the future...

We develop an equilibrium model of industrial structure in which the organization of firms is endogenous. Differentiated consumer products can be produced either by vertically integrated firms or by pairs of specialized companies. Production of each variety of consumer good requires a unique,...

Economic policymaking in modern democracies generates a great deal of special-interest politics. In policy areas such as finance, trade policy, and regulation, policy decision create benefits for well-defined groups with the cost borne by society at large. Given the difficulties with the...