Knowledge that Transforms

This paper argues that precautionary savings due to uninsurable earnings uncertainty are likely to be an important source of aggregate wealth accumulation. The stylized model presented in this paper can easily generate levels of wealth above 60 percent of the observed net wealth in the United States, net of conventional life-cycle savings.

Since 1980, the federal government has directly subsidized one-third of all nonfederal borrowing. This paper presents numerical estimates of the effects of federal lending. Existing credit subsidies appear to have important effects on the allocation of credit, but little effect on aggregate investment. Efficiency costs are shown to be large (approximately 1/3 percent of GNP). Government costs exceed 50 cents per dollar of incremental targeted lending. Interactions among programs can eliminate much or all of the original gain provided by a subsidy, especially if borrowers are rationed. The paper also examines the effects of several policy reforms.

When households are mobile among jurisdictions, income redistribution by individual jurisdictions creates fiscal externalities. A model of interjurisdictional migration is used to study the nature of this redistributive externality. Analysis of optimal redistribution and optimal corrective subsidies from higher-level governments shows that benefit levels for the recipients of income transfers and tax rates on mobile taxpayers should be equalized across jurisdictions. A system of jurisdictions with a common labor market can achieve welfare improvements through coordination of "domestic" redistributive policy or through the intervention of a higher-level government.