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Functional Rational Expectations Equilibria in Market Games

  • Shorish, Jamsheed

    (Department of Economics and Finance, Institute for Advanced Studies, Vienna, Austria)

The rational expectations equilibrium has been criticized as an equilibrium concept in market game environments. Such an equilibrium may not exist generically, or it may introduce unrealistic assumptions about an economic agent's knowledge or computational ability. We define a rational expectations equilibrium as a probability measure over uncertain states of nature which exploits all available information in a market game, and which exists for almost all economies. Furthermore, if retrading is allowed, it is possible for agents to compute such a 'functional rational expectations equilibrium' using straightforward numerical fixed point algorithms.

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File URL: http://www.ihs.ac.at/publications/eco/es-186.pdf
File Function: First version, 2006
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Paper provided by Institute for Advanced Studies in its series Economics Series with number 186.

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Length: 17 pages
Date of creation: Feb 2006
Date of revision:
Handle: RePEc:ihs:ihsesp:186
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  1. Sayantan Ghosal & Massimo Morelli, 2002. "Retrading in Market Games," Economics Working Papers 0012, Institute for Advanced Study, School of Social Science.
  2. Spear, Stephen E., 1988. "Existence and local uniqueness of functional rational expectations equilibria in dynamic economic models," Journal of Economic Theory, Elsevier, vol. 44(1), pages 124-155, February.
  3. Grossman, Sanford J & Stiglitz, Joseph E, 1980. "On the Impossibility of Informationally Efficient Markets," American Economic Review, American Economic Association, vol. 70(3), pages 393-408, June.
  4. Dubey, P. & Rogawski, J. D., 1990. "Inefficiency of smooth market mechanisms," Journal of Mathematical Economics, Elsevier, vol. 19(3), pages 285-304.
  5. Matthew O. Jackson & James Peck, 1997. "Asymmetric Information in a Competitive Market Game: Reexamining the Implications of Rational Expectations," Microeconomics 9711004, EconWPA.
  6. Dubey, Pradeep & Sahi, Siddharta & Shubik, Martin, 1993. "Repeated trade and the velocity of money," Journal of Mathematical Economics, Elsevier, vol. 22(2), pages 125-137.
  7. Dionysius Glycopantis & Allan Muir & Nicholas Yannelis, 2005. "Non-implementation of rational expectations as a perfect Bayesian equilibrium," Economic Theory, Springer, vol. 26(4), pages 765-791, November.
  8. Townsend, Robert M, 1983. "Forecasting the Forecasts of Others," Journal of Political Economy, University of Chicago Press, vol. 91(4), pages 546-88, August.
  9. Grandmont, Jean-Michel, 1977. "Temporary General Equilibrium Theory," Econometrica, Econometric Society, vol. 45(3), pages 535-72, April.
  10. Martin Shubik & Nicolaas J. Vriend, 1999. "A Behavioral Approach to a Strategic Market Game," Research in Economics 99-01-003e, Santa Fe Institute.
  11. Dubey, Pradeep, 1980. "Nash equilibria of market games: Finiteness and inefficiency," Journal of Economic Theory, Elsevier, vol. 22(2), pages 363-376, April.
  12. Dionysius Glycopantis & Allan Muir & Nicholas Yannelis, 2009. "On non-revealing rational expectations equilibrium," Economic Theory, Springer, vol. 38(2), pages 351-369, February.
  13. Kelly, David L. & Shorish, Jamsheed, 2000. "Stability of Functional Rational Expectations Equilibria," Journal of Economic Theory, Elsevier, vol. 95(2), pages 215-250, December.
  14. Erik Balder & Nicholas Yannelis, 2009. "Bayesian–Walrasian equilibria: beyond the rational expectations equilibrium," Economic Theory, Springer, vol. 38(2), pages 385-397, February.
  15. Pradeep Dubey & John Geanakoplos & Martin Shubik, 1982. "Revelation of Information in Strategic Market Games: A Critique of Rational Expectations," Cowles Foundation Discussion Papers 634R, Cowles Foundation for Research in Economics, Yale University, revised Nov 1985.
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