TY - JOUR AU - Saez,Emmanuel TI - Using Elasticities to Derive Optimal Income Tax Rates JF - National Bureau of Economic Research Working Paper Series VL - No. 7628 PY - 2000 Y2 - March 2000 UR - http://www.nber.org/papers/w7628 L1 - http://www.nber.org/papers/w7628.pdf N1 - Author contact info: Emmanuel Saez Department of Economics University of California, Berkeley 530 Evans Hall #3880 Berkeley, CA 94720 Tel: 510/642-4631 Fax: 510/642-6615 E-Mail: saez@econ.berkeley.edu AB - This paper derives optimal income tax formulas using compensated and uncompensated elasticities of earnings with respect to tax rates. A simple formula for the high income optimal tax rate is obtained as a function of these elasticities and the thickness of the top tail of the income distribution. In the general non-linear income tax problem, this method using elasticities shows precisely how the different economic effects come into play and which are the key relevant parameters in the optimal income tax formulas of Mirrlees. The optimal non-linear tax rate formulas are expressed in terms of elasticities and the shape of the income distribution. These formulas are implemented numerically using empirical earnings distributions and a range of realistic elasticity parameters. ER -