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Social security and risk sharing

  • Gottardi, Piero
  • Kubler, Felix

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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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
Contact details of provider: Web page: http://www.elsevier.com/locate/inca/622869

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  1. Olovsson, Conny, 2004. "The Welfare Gains of Improving Risk Sharing in Social Security," Seminar Papers 728, Stockholm University, Institute for International Economic Studies.
  2. Olovsson, Conny, 2010. "Quantifying the risk-sharing welfare gains of social security," Journal of Monetary Economics, Elsevier, vol. 57(3), pages 364-375, April.
  3. Chattopadhyay, Subir & Gottardi, Piero, 1999. "Stochastic OLG Models, Market Structure, and Optimality," Journal of Economic Theory, Elsevier, vol. 89(1), pages 21-67, November.
  4. Constantinides, G.M. & Donalson, J.B. & Mehra, R., 1997. "Junior Can't Borrow: A New Perspective on the Equity Premium Puzzle," Papers 97-24, Columbia - Graduate School of Business.
  5. Gordon, Roger H. & Varian, Hal R., 1988. "Intergenerational risk sharing," Journal of Public Economics, Elsevier, vol. 37(2), pages 185-202, November.
  6. 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.
  7. Dirk Krueger and Felix Kubler, 2001. "Intergenerational Risk Sharing: Myth or Possibility," Computing in Economics and Finance 2001 188, Society for Computational Economics.
  8. 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.
  9. 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.
  10. 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.
  11. Bohn, Henning, 2009. "Intergenerational risk sharing and fiscal policy," Journal of Monetary Economics, Elsevier, vol. 56(6), pages 805-816, September.
  12. 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.
  13. Peter Diamond & John Geanakoplos, 2001. "Social Security Investment in Equities," Cowles Foundation Discussion Papers 1314R, Cowles Foundation for Research in Economics, Yale University, revised Aug 2002.
  14. 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.
  15. 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.
  16. Laurence Ball & N. Gregory Mankiw, 2001. "Intergenerational Risk Sharing in the Spirit of Arrow, Debreu, and Rawls, with Applications to Social Security Design," Harvard Institute of Economic Research Working Papers 1921, Harvard - Institute of Economic Research.
  17. 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.
  18. 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.
  19. 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.
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