The taxation of capital income in an open economy: the importance of resident-nonresident tax treatment

Abstract

The authors develop a simulation model of the United States and the rest of the world to demonstrate how international capital mobility alters the incidence and capital formation incentives of taxes on capital income. The model explicitly recognizes that U.S. and foreign investors hold a different mix of assets in each country. Only a modest degree of international mobility is necessary to substantially alter closed-economy patterns of tax incidence. Differences in the tax treatment of residents and foreigners are particularly important in evaluating tax reductions at the individual level or the integration of corporate and individual income taxes.