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Social Security and Risk Sharing

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Author Info
Piero Gottardi ()
Felix Kubler ()

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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 overlapping generations economy with capital accumulation and land. We argue that these conditions are consistent with many calibrations of the model used in the literature. In our model financial markets are complete and competitive equilibria are interim Pareto efficient. Therefore, a welfare improvement can only be obtained if agents’ welfare is evaluated ex ante, and arises from the possibility of inducing, through social security, an improved level of intergenerational risk sharing. We will also examine the optimal size of a given social security system as well as its optimal reform. The analysis will be carried out in a relatively simple set-up, where the various effects of social security, on the prices of long-lived assets and the stock of capital, and hence on output, wages and risky rates of returns, can be clearly identified.

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Publisher Info
Paper provided by CESifo Group Munich in its series CESifo Working Paper Series with number CESifo Working Paper No. 1705.

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Date of creation: 2006
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Handle: RePEc:ces:ceswps:_1705

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Related research
Keywords: intergenerational risk sharing; social security; ex ante welfare improvements; interim optimality; price effects;

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Find related papers by JEL classification:
D58 - Microeconomics - - General Equilibrium and Disequilibrium - - - Computable and Other Applied General Equilibrium Models
D91 - Microeconomics - - Intertemporal Choice and Growth - - - Intertemporal Consumer Choice; Life Cycle Models and Saving
E62 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Fiscal Policy
H55 - Public Economics - - National Government Expenditures and Related Policies - - - Social Security and Public Pensions

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Roger H. Gordon & Hal R. Varian, 1985. "Intergenerational Risk Sharing," NBER Working Papers 1730, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
    Other versions:
  2. Chattopadhyay, Subir & Gottardi, Piero, 1999. "Stochastic OLG Models, Market Structure, and Optimality," Journal of Economic Theory, Elsevier, vol. 89(1), pages 21-67, November. [Downloadable!] (restricted)
    Other versions:
  3. Robert J. Shiller, 1998. "Social Security and Institutions for Intergenerational, Intragenerational and International Risk Sharing," Cowles Foundation Discussion Papers 1185, Cowles Foundation, Yale University. [Downloadable!]
    Other versions:
  4. 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. [Downloadable!]
    Other versions:
  5. 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. [Downloadable!] (restricted)
  6. Martin Feldstein & Jeffrey B. Liebman, 2001. "Social Security," NBER Working Papers 8451, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
    Other versions:
    • 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. [Downloadable!] (restricted)
  7. 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. [Downloadable!] (restricted)
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  8. Henning Bohn, 2004. "Intergenerational Risk Sharing and Fiscal Policy," 2004 Meeting Papers 22, Society for Economic Dynamics. [Downloadable!]
  9. 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. [Downloadable!] (restricted)
  10. 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. [Downloadable!] (restricted)
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  11. 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. [Downloadable!] (restricted)
  12. Peter Diamond & John Geanakoplos, 2003. "Social Security Investment in Equities," American Economic Review, American Economic Association, vol. 93(4), pages 1047-1074, September. [Downloadable!]
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  13. Olovsson, Conny, 2004. "The Welfare Gains of Improving Risk Sharing in Social Security," Seminar Papers 728, Stockholm University, Institute for International Economic Studies. [Downloadable!]
  14. Kent A. Smetters, 2004. "Trading with the Unborn: A New Perspective on Capital Income Taxation," Working Papers wp066, University of Michigan, Michigan Retirement Research Center. [Downloadable!]
    Other versions:
  15. Demange, G., 2000. "On Optimality of Intergenerational Risk Sharing," DELTA Working Papers 2000-05, DELTA (Ecole normale supérieure).
  16. 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. [Downloadable!] (restricted)
  17. Georges de Menil & Eytan Sheshinski, 2004. "Planning for the Optimal Mix of Paygo Tax and Funded Savings," DELTA Working Papers 2004-15, DELTA (Ecole normale supérieure). [Downloadable!]
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  18. Enders, Walter & Lapan, Harvey E, 1982. "Social Security Taxation and Intergenerational Risk Sharing," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 23(3), pages 647-58, October. [Downloadable!] (restricted)
    Other versions:
Full references

Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Beetsma, Roel & Bovenberg, A Lans, 2007. "Pension systems, Intergenerational Risk Sharing and Inflation," CEPR Discussion Papers 6089, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
  2. Beetsma, Roel / Romp, Ward E. / Vos, Siert J., 2008. "Intergenerational Risk Sharing, Pensions and Endogenous Labor Supply in General Equilibrium," CESifo Working Paper Series CESifo Working Paper No. , CESifo Group Munich. [Downloadable!]
  3. Alexander Ludwig & Michael Reiter, 2008. "Sharing Demographic Risk – Who is Afraid of the Baby Bust?," MEA discussion paper series 08166, Mannheim Research Institute for the Economics of Aging (MEA), University of Mannheim. [Downloadable!]
    Other versions:
  4. Marcello D’Amato & Vincenzo Galasso, 2008. "Political Intergenerational Risk Sharing," Working Papers 342, IGIER (Innocenzo Gasparini Institute for Economic Research), Bocconi University. [Downloadable!]
    Other versions:
  5. Luciano Greco, 2008. "A Note on Social Security and Public Debt," "Marco Fanno" Working Papers 0083, Dipartimento di Scienze Economiche "Marco Fanno". [Downloadable!]
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This page was last updated on 2009-11-3.

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