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Equilibrium theory under ambiguity

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  • He, Wei
  • Yannelis, Nicholas C.

Abstract

We extend the classical results on the Walras–core existence and equivalence to an ambiguous asymmetric information economy; that is, an economy where agents maximize Maximin Expected Utility (MEU). The interest of considering ambiguity arises from the fact that, in the presence of MEU decision making, there is no conflict between efficiency and incentive compatibility (contrary to the Bayesian decision making). Our new modeling of an ambiguous asymmetric information economy necessitates new equilibrium notions, which are always efficient and incentive compatible.

Suggested Citation

  • He, Wei & Yannelis, Nicholas C., 2015. "Equilibrium theory under ambiguity," Journal of Mathematical Economics, Elsevier, vol. 61(C), pages 86-95.
  • Handle: RePEc:eee:mateco:v:61:y:2015:i:c:p:86-95
    DOI: 10.1016/j.jmateco.2015.08.004
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    1. Le Van, Cuong & Navrouzoglou, Paulina & Vailakis, Yiannis, 2019. "On endogenous formation of price expectations," Games and Economic Behavior, Elsevier, vol. 115(C), pages 436-458.
    2. R. R. Routledge & R. A. Edwards, 2020. "Ambiguity and price competition," Theory and Decision, Springer, vol. 88(2), pages 231-256, March.
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    4. Sun, Xiang & Sun, Yeneng & Wu, Lei & Yannelis, Nicholas C., 2017. "Equilibria and incentives in private information economies," Journal of Economic Theory, Elsevier, vol. 169(C), pages 474-488.
    5. de Castro, Luciano I. & Liu, Zhiwei & Yannelis, Nicholas C., 2017. "Implementation under ambiguity," Games and Economic Behavior, Elsevier, vol. 101(C), pages 20-33.

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