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Social security and risk sharing

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Author Info

  • Gottardi, Piero
  • Kubler, Felix

Abstract

In this paper we identify conditions under which the introduction of a pay-as-you-go social security system is ex ante Pareto-improving in a stochastic OLG economy with capital accumulation and land. We argue that these conditions are consistent with realistic specifications of the parameters of the economy. In our model financial markets are complete and competitive equilibria interim Pareto efficient. Therefore, a welfare improvement can only be obtained if agents[modifier letter apostrophe] welfare is evaluated ex ante, and arises from an improvement in intergenerational risk sharing. We also examine the optimal size of a given social security system as well as its optimal reform.

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Bibliographic Info

Article provided by Elsevier in its journal Journal of Economic Theory.

Volume (Year): 146 (2011)
Issue (Month): 3 (May)
Pages: 1078-1106

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Handle: RePEc:eee:jetheo:v:146:y:2011:i:3:p:1078-1106

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Web page: http://www.elsevier.com/locate/inca/622869

Related research

Keywords: Intergenerational risk sharing Social security Ex ante welfare improvements Social security reform Price effects;

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References

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  1. Kent A. Smetters, 2003. "Trading with the Unborn: A New Perspective on Capital Income Taxation," NBER Working Papers 9412, National Bureau of Economic Research, Inc.
  2. Piero Gottardi & Subir Chattopadhyay, 1999. "- Stochastic Olg Models, Market Structure And Optimality," Working Papers. Serie AD 1999-15, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
  3. Laurence Ball & N. Gregory Mankiw, 2007. "Intergenerational Risk Sharing in the Spirit of Arrow, Debreu, and Rawls, with Applications to Social Security Design," Journal of Political Economy, University of Chicago Press, vol. 115(4), pages 523-547, 08.
  4. De Menil, Georges & Murtin, Fabrice & Sheshinski, Eytan, 2006. "Planning for the optimal mix of paygo tax and funded savings," Journal of Pension Economics and Finance, Cambridge University Press, vol. 5(01), pages 1-25, March.
  5. Demange, Gabrielle & Laroque, Guy, 2000. " Social Security, Optimality, and Equilibria in a Stochastic Overlapping Generations Economy," Journal of Public Economic Theory, Association for Public Economic Theory, vol. 2(1), pages 1-23.
  6. Shiller, Robert J., 1999. "Social security and institutions for intergenerational, intragenerational, and international risk-sharing," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 50(1), pages 165-204, June.
  7. George M. Constantinides & John B. Donaldson & Rajnish Mehra, 2002. "Junior Can'T Borrow: A New Perspective On The Equity Premium Puzzle," The Quarterly Journal of Economics, MIT Press, vol. 117(1), pages 269-296, February.
  8. Martin Feldstein & Jeffrey B. Liebman, 2001. "Social Security," NBER Working Papers 8451, National Bureau of Economic Research, Inc.
    • Feldstein, Martin & Liebman, Jeffrey B., 2002. "Social security," Handbook of Public Economics, in: A. J. Auerbach & M. Feldstein (ed.), Handbook of Public Economics, edition 1, volume 4, chapter 32, pages 2245-2324 Elsevier.
  9. Henning Bohn, 2004. "Intergenerational Risk Sharing and Fiscal Policy," 2004 Meeting Papers 22, Society for Economic Dynamics.
  10. Enders, Walter & Lapan, Harvey E., 1982. "Social Security Taxation and Inter-Generational Risk Sharing," Staff General Research Papers 10822, Iowa State University, Department of Economics.
  11. Wang Yong, 1993. "Stationary Equilibria in an Overlapping Generations Economy with Stochastic Production," Journal of Economic Theory, Elsevier, vol. 61(2), pages 423-435, December.
  12. Olovsson, Conny, 2004. "The Welfare Gains of Improving Risk Sharing in Social Security," Seminar Papers 728, Stockholm University, Institute for International Economic Studies.
  13. Ayse Imrohoroglu & Selahattin Imrohoroglu & Douglas H. Joines, 1999. "Social Security in an Overlapping Generations Economy with Land," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 2(3), pages 638-665, July.
  14. Peter Diamond & John Geanakoplos, 2003. "Social Security Investment in Equities," American Economic Review, American Economic Association, vol. 93(4), pages 1047-1074, September.
  15. Roger H. Gordon & Hal R. Varian, 1985. "Intergenerational Risk Sharing," NBER Working Papers 1730, National Bureau of Economic Research, Inc.
  16. Krueger, Dirk & Kubler, Felix, 2004. "Computing equilibrium in OLG models with stochastic production," Journal of Economic Dynamics and Control, Elsevier, vol. 28(7), pages 1411-1436, April.
  17. Rao Aiyagari, S. & Peled, Dan, 1991. "Dominant root characterization of Pareto optimality and the existence of optimal equilibria in stochastic overlapping generations models," Journal of Economic Theory, Elsevier, vol. 54(1), pages 69-83, June.
  18. Olovsson, Conny, 2010. "Quantifying the risk-sharing welfare gains of social security," Journal of Monetary Economics, Elsevier, vol. 57(3), pages 364-375, April.
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