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Optimal Income Taxation with Multidimensional Taxpayer Types

  • Che-Lin Su

    ()

    (CMS-EMS Kellogg School of Management, Northwestern University)

  • Kenneth L. Judd

    (Hoover Institution)

Beginning with Mirrlees, the optimal taxation literature has generally focused on economies where individuals are differentiated by only their productivity. In this pa- per we examine models with discrete types where individuals are differentiated by two or more characteristics. For example, we examine the case where individuals also have different tastes for labor supply. We find that the extra dimensionality produces substantively different results, such as negative marginal tax rates for some high pro- ductivity taxpayers. This is a difficult nonlinear optimization problem because quite often, the linear independence constraint qualification does not hold at a solution. To robustly solve these degenerate nonlinear programs, we use the solver SNOPT, an SQP method with an elastic-mode. Our computational framework proposed in this paper can also be applied to solve problems that arise in multidimensional nonlinear pricing and mechanism design

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Paper provided by Society for Computational Economics in its series Computing in Economics and Finance 2006 with number 471.

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Date of creation: 04 Jul 2006
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Handle: RePEc:sce:scecfa:471
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