TY - UNPD A1 - Conesa, Juan Carlos A1 - Krueger, Dirk T1 - On the optimal progressivity of the income tax code T2 - Center for Financial Studies (Frankfurt am Main): CFS working paper series ; No. 2005,10 N2 - This paper computes the optimal progressivity of the income tax code in a dynamic general equilibrium model with household heterogeneity in which uninsurable labor productivity risk gives rise to a nontrivial income and wealth distribution. A progressive tax system serves as a partial substitute for missing insurance markets and enhances an equal distribution of economic welfare. These beneficial effects of a progressive tax system have to be traded off against the efficiency loss arising from distorting endogenous labor supply and capital accumulation decisions. Using a utilitarian steady state social welfare criterion we find that the optimal US income tax is well approximated by a flat tax rate of 17:2% and a fixed deduction of about $9,400. The steady state welfare gains from a fundamental tax reform towards this tax system are equivalent to 1:7% higher consumption in each state of the world. An explicit computation of the transition path induced by a reform of the current towards the optimal tax system indicates that a majority of the population currently alive (roughly 62%) would experience welfare gains, suggesting that such fundamental income tax reform is not only desirable, but may also be politically feasible. JEL Klassifikation: E62, H21, H24 . T3 - CFS working paper series - 2005, 10 KW - Progressive Taxation KW - Optimal Taxation KW - Flat Taxes KW - Social Insurance KW - Transition KW - Einkommensteuer KW - Steuerprogression Y1 - 2005 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/4407 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30-10855 IS - March 17, 2005 ER -