This paper characterizes long-run and short-run optimal fiscal policy in the labor selection framework. In a calibrated non-Ramsey decentralized equilibrium, labor market volatility is inefficient. Keeping fixed the structural parameters, the Ramsey government achieves efficient labor market volatility; doing so requires labor-income tax volatility that is orders of magnitude larger than the "tax-smoothing" results based on Walrasian labor markets, but a few times smaller than the results based on search and matching markets. We analytically characterize selection-model-consistent wedges and inefficiencies in order to understand optimal tax volatility. (C) 2018 Elsevier B.V. All rights reserved.
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