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Social Security and Risk Sharing

Author

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  • Piero Gottardi
  • Felix Kubler

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.

Suggested Citation

  • Piero Gottardi & Felix Kubler, 2006. "Social Security and Risk Sharing," CESifo Working Paper Series 1705, CESifo Group Munich.
  • Handle: RePEc:ces:ceswps:_1705
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    References listed on IDEAS

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    Cited by:

    1. D'Amato, Marcello & Galasso, Vincenzo, 2010. "Political intergenerational risk sharing," Journal of Public Economics, Elsevier, vol. 94(9-10), pages 628-637, October.
    2. R. Beetsma & A. L. Bovenberg, 2006. "Pension systems, intergenerational risk sharing and inflation," European Economy - Economic Papers 2008 - 2015 257, Directorate General Economic and Financial Affairs (DG ECFIN), European Commission.
    3. Roel M. W. J. Beetsma & Ward E. Romp & Siert J. Vos, 2013. "Intergenerational Risk Sharing, Pensions, and Endogenous Labour Supply in General Equilibrium," Scandinavian Journal of Economics, Wiley Blackwell, vol. 115(1), pages 141-154, January.
    4. Alexander Ludwig & Michael Reiter, 2008. "Sharing Demographic Risk – Who is Afraid of the Baby Bust?," CESifo Working Paper Series 2422, CESifo Group Munich.
    5. Gollier, Christian, 2008. "Intergenerational risk-sharing and risk-taking of a pension fund," Journal of Public Economics, Elsevier, vol. 92(5-6), pages 1463-1485, June.
    6. Carsten Krabbe Nielsen, 2009. "Rational Overconfidence and Social Security," Discussion Paper Series 0916, Institute of Economic Research, Korea University.
    7. Ohtaki, Eisei, 2014. "Tractable graphical device for analyzing stationary stochastic OLG economies," Journal of Macroeconomics, Elsevier, vol. 40(C), pages 16-26.
    8. Ohtaki, Eisei, 2013. "Golden rule optimality in stochastic OLG economies," Mathematical Social Sciences, Elsevier, vol. 65(1), pages 60-66.
    9. Beetsma, Roel M.W.J. & Romp, Ward E. & Vos, Siert J., 2012. "Voluntary participation and intergenerational risk sharing in a funded pension system," European Economic Review, Elsevier, vol. 56(6), pages 1310-1324.
    10. Roel Beetsma & Ward Romp, 2013. "Participation Constraints in Pension Systems," Tinbergen Institute Discussion Papers 13-149/VI, Tinbergen Institute.
    11. Corbae, Dean & Marimon, Ramon, 2011. "Introduction to Incompleteness and Uncertainty in Economics," Journal of Economic Theory, Elsevier, vol. 146(3), pages 775-784, May.
    12. Devis Geron, 2009. "Social Security Incidence under Uncertainty Assessing Italian Reforms," CESifo Working Paper Series 2812, CESifo Group Munich.
    13. Roel M. W. J. Beetsma & A. Lans Bovenberg, 2009. "Pensions and Intergenerational Risk-sharing in General Equilibrium," Economica, London School of Economics and Political Science, vol. 76(302), pages 364-386, April.
    14. Roel Beetsma & Alessandro Bucciol, 2011. "Risk Sharing in Defined-Contribution Funded Pension Systems," CESifo Working Paper Series 3640, CESifo Group Munich.
    15. Eugeni, Sara, 2015. "Nominal Exchange Rates and Net Foreign Assets' Dynamics: the Stabilization Role of Valuation Effects," MPRA Paper 63549, University Library of Munich, Germany.
    16. De Menil, Georges & Murtin, Fabrice & Sheshinski, Eytan & Yokossi, Tite, 2016. "A rational, economic model of paygo tax rates," European Economic Review, Elsevier, vol. 89(C), pages 55-72.
    17. Wolfgang Kuhle, 2014. "The Optimal Structure for Public Debt," Metroeconomica, Wiley Blackwell, vol. 65(2), pages 321-348, May.
    18. Luciano Greco, 2008. "A Note on Social Security and Public Debt," "Marco Fanno" Working Papers 0083, Dipartimento di Scienze Economiche "Marco Fanno".
    19. Metzger, Christoph, 2016. "The German statutory pension scheme: Balance sheet, cross-sectional internal rates of return and implicit tax rates," FZG Discussion Papers 63, University of Freiburg, Research Center for Generational Contracts (FZG).
    20. Koichi Miyazaki, 2014. "Efficiency and Lack of Commitment in an Overlapping Generations Model with Endowment Shocks," The Japanese Economic Review, Japanese Economic Association, vol. 65(4), pages 499-520, December.

    More about this item

    Keywords

    intergenerational risk sharing; social security; ex ante welfare improvements; interim optimality; price effects;

    JEL classification:

    • H55 - Public Economics - - National Government Expenditures and Related Policies - - - Social Security and Public Pensions
    • E62 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Fiscal Policy
    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making
    • D58 - Microeconomics - - General Equilibrium and Disequilibrium - - - Computable and Other Applied General Equilibrium Models

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