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Ambiguity and rational expectations equilibria

  • Jayant V Ganguli

    (Cornell University)

  • Scott Condie

    (Brigham Young University)

This paper proves the existence and robustness of partially-revealing rational expectations equilibria (REE) when this equilibrium concept is expanded to allow for some agents to have preferences that display ambiguity aversion. Furthermore, the generic existence of fully- revealing REE is proven for a commonly-used subset of the class of ambiguity averse preferences. This finding illustrates that models with ambiguity aversion provide a relatively tractable framework through which partial information revelation may be studied in a general equilibrium setting without relying on particular distributional assumptions or the presence of noise traders. Constructive examples are also provided.

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File URL: https://economicdynamics.org/meetpapers/2008/paper_719.pdf
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Paper provided by Society for Economic Dynamics in its series 2008 Meeting Papers with number 719.

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Date of creation: 2008
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Handle: RePEc:red:sed008:719
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Society for Economic Dynamics Marina Azzimonti Department of Economics Stonybrook University 10 Nicolls Road Stonybrook NY 11790 USA

Web page: http://www.EconomicDynamics.org/society.htm
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  1. Pietra, Tito & Siconolfi, Paolo, 1997. "Extrinsic Uncertainty and the Informational Role of Prices," Journal of Economic Theory, Elsevier, vol. 77(1), pages 154-180, November.
  2. Itzhak Gilboa & Andrew Postlewaite & David Schmeidler, 2004. "Rationality of Belief Or: Why Savage's axioms are neither necessary nor sufficient for rationality, Second Version," PIER Working Paper Archive 08-043, Penn Institute for Economic Research, Department of Economics, University of Pennsylvania, revised 03 Dec 2008.
  3. Marciano Siniscalchi, 2003. "A Behavioral Characterization of Plausible Priors," Discussion Papers 1365, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  4. Jean-Marc Tallon, 1998. "Asymmetric Information, Nonadditive Expected Utility, and the Information Revealed by Prices: An Example," Post-Print halshs-00502491, HAL.
  5. Han Ozsoylev & Jan Werner, 2011. "Liquidity and asset prices in rational expectations equilibrium with ambiguous information," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 48(2), pages 469-491, October.
  6. Polemarchakis, H. & Siconolfi, P., 1991. "Asset markets and the information revealed by prices," CORE Discussion Papers 1991034, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  7. Zambrano, Eduardo, 2005. "Testable implications of subjective expected utility theory," Games and Economic Behavior, Elsevier, vol. 53(2), pages 262-268, November.
  8. Allen, Beth E, 1981. "Generic Existence of Completely Revealing Equilibria for Economies with Uncertainty when Prices Convey Information," Econometrica, Econometric Society, vol. 49(5), pages 1173-99, September.
  9. Itzhak Gilboa & Andrew Postlewaite & David Schmeidler, 2004. "Rationality of Belief," Levine's Bibliography 122247000000000690, UCLA Department of Economics.
  10. Itzhak Gilboa & Andrew Postlewaite & David Schmeidler, 2004. "Rationality of Belief Or Why Bayesianism is neither necessary nor sufficient for rationality," PIER Working Paper Archive 04-011, Penn Institute for Economic Research, Department of Economics, University of Pennsylvania.
  11. Jordan, J. S., 1982. "The generic existence of rational expectations equilibrium in the higher dimensional case," Journal of Economic Theory, Elsevier, vol. 26(2), pages 224-243, April.
  12. Mas-Colell, Andreu & Whinston, Michael D. & Green, Jerry R., 1995. "Microeconomic Theory," OUP Catalogue, Oxford University Press, number 9780195102680, December.
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