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Individual heterogeneity, nonlinear budget sets, and taxable income

Authors: Soren Blomquist , Anil Kumar , Che-Yuan Liang and Whitney K. Newey
Date: 01 May 2014
Type: cemmap Working Paper, CWP21/14
DOI: 10.1920/wp.cem.2014.2114


Given the key role of the taxable income elasticity in designing an optimal tax system there are many studies attempting to estimate this elasticity. To account for nonlinear taxes these studies either use instrumental variables approaches that are not fully consistent, or impose strong functional form assumptions. None allow for general heterogeneity in preferences. In this paper we derive the mean and distribution of taxable income, conditional on a nonlinear budget set, allowing general heterogeneity and optimization errors for the mean. We find an important dimension reduction and use that to develop nonparametric estimation methods. We show how to nonparametrically estimate the conditional mean of taxable income imposing all the restrictions of utility maximization and allowing for measurement errors. We apply this method to Swedish data and estimate for prime age males a significant net of tax elasticity of 0.6 and a significant income elasticity of -0.08.

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Soren Blomquist, Anil Kumar, Che-Yuan Liang and Whitney K. Newey May 2015, Individual heterogeneity, nonlinear budget sets and taxable income, cemmap Working Paper, CWP21/15, Institute for Fiscal Studies

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