Income taxation with frictional labor supply

Nicolas Werquin

No 603, 2016 Meeting Papers from Society for Economic Dynamics

Abstract: This paper characterizes the optimal labor income taxes in an environment where labor supply choices are subject to frictions. Agents incur a fixed cost of adjusting their hours of work in response to changes in their idiosyncratic wages or the tax rates. This fixed cost can be thought of as the cost of searching for a new job in an economy where hours are constrained within the firm. I derive a formula that characterizes the optimal long-run progressive tax schedule in this economy. Adjustment frictions generate endogenously an extensive margin of labor supply conditional on participation. In addition to the standard intensive margin disincentive effects of taxes, the optimal tax schedule takes into account their effects on the endogenous option value of adjusting hours of work, and therefore depends on several new elasticities and marginal social welfare weights. I evaluate the quantitative magnitude of these novel theoretical effects and show that for a given intensive margin labor supply elasticity, the optimal long-run tax schedule is less progressive than a frictionless model would predict. The welfare miscalculations by wrongly assuming that labor supply is frictionless can be large, and are decreasing in the size of the intensive margin labor income elasticity.

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:red:sed016:603

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