Optimal Piecewise Linear Income Taxation
Given its signiÖcance in practice, piecewise linear taxation has received relatively little attention in the literature. This paper o§ers a simple and transparent analysis of its main characteristics. We fully characterize optimal tax parameters for the cases in which budget sets are convex and nonconvex respectively. A numerical analysis of a discrete version of the model shows the circumstances under which each of these cases will hold as a global optimum. We Önd that, given plausible parameter values and wage distributions, the globally optimal tax system is convex, and marginal rate progressivity increases with rising inequality.
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