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Constrained Inefficiency and Optimal Taxation with Uninsurable Risks

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  • Piero Gottardi

    (European University Instutite)

  • Atsushi Kajii

    (Institute of Economic Research, Kyoto University)

  • Tomoyuki Nakajima

    (Institute of Economic Research, Kyoto University)

Abstract

When individuals' labor and capital income are subject to uninsurable idiosyncratic risks, should capital and labor be taxed, and if so how? In a two period general equilibrium model with production, we derive a decomposition formula of the welfare e ects of these taxes into insurance and distribution e ects. This allows us to determine how the sign of the optimal taxes on capital and labor depend on the nature of the shocks, the degree of heterogeneity among consumers' income as well as on the way in which the tax revenue is used to provide lump sum transfers to consumers. When shocks a ect primarily labor income and heterogeneity is small, the optimal tax on capital is positive. However in other cases a negative tax on capital is welfare improving.

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Bibliographic Info

Paper provided by Kyoto University, Institute of Economic Research in its series KIER Working Papers with number 694.

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Length: 32pages
Date of creation: Jan 2010
Date of revision:
Handle: RePEc:kyo:wpaper:694

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  1. N. Gregory Mankiw & Matthew Weinzierl & Danny Yagan, 2009. "Optimal Taxation in Theory and Practice," Journal of Economic Perspectives, American Economic Association, vol. 23(4), pages 147-74, Fall.
  2. Chari, V.V. & Kehoe, Patrick J., 1999. "Optimal fiscal and monetary policy," Handbook of Macroeconomics, in: J. B. Taylor & M. Woodford (ed.), Handbook of Macroeconomics, edition 1, volume 1, chapter 26, pages 1671-1745 Elsevier.
  3. Julio Davila & Jay H. Hong & Per Krusell & Jose-Victor Rios-Rull, 2005. "Constrained efficiency in the neoclassical growth model with uninsurable idiosyncratic shocks," PIER Working Paper Archive 05-023, Penn Institute for Economic Research, Department of Economics, University of Pennsylvania.
  4. Stiglitz, Joseph E, 1982. "The Inefficiency of the Stock Market Equilibrium," Review of Economic Studies, Wiley Blackwell, vol. 49(2), pages 241-61, April.
  5. Kenneth L. Judd, 1982. "Redistributive Taxation in a Simple Perfect Foresight Model," Discussion Papers 572, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  6. Atsushi Kajii & Antonio Villanacci & Alessandro Citanna, 1998. "Constrained suboptimality in incomplete markets: a general approach and two applications," Economic Theory, Springer, vol. 11(3), pages 495-521.
  7. Chamley, Christophe, 1986. "Optimal Taxation of Capital Income in General Equilibrium with Infinite Lives," Econometrica, Econometric Society, vol. 54(3), pages 607-22, May.
  8. George-Marios Angeletos, 2007. "Uninsured Idiosyncratic Investment Risk and Aggregate Saving," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 10(1), pages 1-30, January.
  9. repec:hal:journl:halshs-00196183 is not listed on IDEAS
  10. Hart, Oliver D., 1975. "On the optimality of equilibrium when the market structure is incomplete," Journal of Economic Theory, Elsevier, vol. 11(3), pages 418-443, December.
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Cited by:
  1. Tomoyuki Nakajima & Atsushi Kajii & Piero Gottardi, 2011. "Optimal taxation and constrained inefficiency in an in finite-horizon economy with incomplete markets," 2011 Meeting Papers 455, Society for Economic Dynamics.
  2. Sigrid Röhrs & Christoph Winter, 2011. "Wealth inequality and the optimal level of government debt," ECON - Working Papers 051, Department of Economics - University of Zurich.
  3. R. Anton Braun & Tomoyuki Nakajima, 2011. "Uninsured countercyclical risk: an aggregation result and application to optimal monetary policy," Working Paper 2011-04, Federal Reserve Bank of Atlanta.

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