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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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Paper provided by Society for Economic Dynamics in its series 2008 Meeting Papers with number 719.

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Date of creation: 2008
Date of revision:
Handle: RePEc:red:sed008:719
Contact details of provider: Postal: Society for Economic Dynamics Marina Azzimonti Department of Economics Stonybrook University 10 Nicolls Road Stonybrook NY 11790 USA
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  1. Mas-Colell, Andreu & Whinston, Michael D. & Green, Jerry R., 1995. "Microeconomic Theory," OUP Catalogue, Oxford University Press, number 9780195102680.
  2. Rigotti, Luca & Shannon, Chris, 2012. "Sharing risk and ambiguity," Journal of Economic Theory, Elsevier, vol. 147(5), pages 2028-2039.
  3. Polemarchakis, H M & Siconolfi, P, 1993. "Asset Markets and the Information Revealed by Prices," Economic Theory, Springer, vol. 3(4), pages 645-61, October.
  4. Rahi, Rohit, 1995. "Partially revealing rational expectations equilibria with nominal assets," Journal of Mathematical Economics, Elsevier, vol. 24(2), pages 137-146.
  5. Zambrano, Eduardo, 2005. "Testable implications of subjective expected utility theory," Games and Economic Behavior, Elsevier, vol. 53(2), pages 262-268, November.
  6. Han Ozsoylev & Jan Werner, 2011. "Liquidity and asset prices in rational expectations equilibrium with ambiguous information," Economic Theory, Springer, vol. 48(2), pages 469-491, October.
  7. Tallon, Jean-Marc, 1998. "Asymmetric Information, Nonadditive Expected Utility, and the Information Revealed by Prices: An Example," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 39(2), pages 329-42, May.
  8. 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.
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