English, Article, Journal or magazine article edition: mic Efficiency and Pareto Optimality in a Stochastic OLG Model with Production and Social Security Martin Barbie; Marcus Hagedorn; Ashok Kaul

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Bookmark: http://trove.nla.gov.au/version/52497
Physical Description
  • preprint
Language
  • English

Edition details

Title
  • mic Efficiency and Pareto Optimality in a Stochastic OLG Model with Production and Social Security
Author
  • Martin Barbie
  • Marcus Hagedorn
  • Ashok Kaul
Physical Description
  • preprint
Notes
  • We analyze the interaction between risk sharing and capital accumulation in a stochastic OLG model with production. We give a complete characterization of interim Pareto optimality. Our characterization also subsumes equilibria with a PAYG social security system. In a competitive equilibrium interim Pareto optimality is equivalent to intergenerational exchange efficiency, which in turn implies dynamic efficiency. Furthermore, dynamic efficiency does not rule out a Pareto-improving role for a social security system. Social security can provide insurance against macroeconomic risk, namely aggregate productivity risk in the second period of life (old age) through dynamic risk sharing. We briefly relate our results to models without uncertainty where the notions of exchange efficiency, dynamic efficiency and interim Pareto optimality are all equivalent in a competitive equilibrium.
  • Stochastic OLG Model, Dynamic Efficiency, Interim Pareto Optimality, Social Security, Risk Sharing
  • RePEc:bon:bonedp:bgse8_2000
Language
  • English
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