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Proof of the Existence of Speculative Equilibria


  • Matthew O. Jackson


The existence of speculative equilibria is proven in a simple overlapping generations, infinite horizon economy. In equilibrium, all agents bid assets according to increasing functions of private information which is uncorrelated with the fundamental value (dividend stream) of the asset. This is a unique best response to the strategies of the other agents, which implies that speculative information is valuable.

Suggested Citation

  • Matthew O. Jackson, 1992. "Proof of the Existence of Speculative Equilibria," Discussion Papers 1003, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  • Handle: RePEc:nwu:cmsems:1003

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    References listed on IDEAS

    1. Peck, James, 1988. "On the existence of sunspot equilibria in an overlapping generations model," Journal of Economic Theory, Elsevier, vol. 44(1), pages 19-42, February.
    2. Forges, Francoise & Peck, James, 1995. "Correlated Equilibrium and Sunspot Equilibrium," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 5(1), pages 33-50, January.
    3. Cass, David & Shell, Karl, 1983. "Do Sunspots Matter?," Journal of Political Economy, University of Chicago Press, vol. 91(2), pages 193-227, April.
    4. Jackson, Matthew & Peck, James, 1991. "Speculation and price fluctuations with private, extrinsic signals," Journal of Economic Theory, Elsevier, vol. 55(2), pages 274-295, December.
    5. James Peck & Karl Shell, 1991. "Market Uncertainty: Correlated and Sunspot Equilibria in Imperfectly Competitive Economies," Review of Economic Studies, Oxford University Press, vol. 58(5), pages 1011-1029.
    6. Spear, Stephen E, 1989. "Are Sunspots Necessary?," Journal of Political Economy, University of Chicago Press, vol. 97(4), pages 965-973, August.
    7. James Peck & Karl Shell, 2003. "Equilibrium Bank Runs," Journal of Political Economy, University of Chicago Press, vol. 111(1), pages 103-123, February.
    8. Azariadis, Costas, 1981. "Self-fulfilling prophecies," Journal of Economic Theory, Elsevier, vol. 25(3), pages 380-396, December.
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    Cited by:

    1. Matthew Spiegel, 1996. "Stock Price Volatility in a Multiple Security Overlapping Generations Model," Finance 9608002, EconWPA.

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