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Common priors under incomplete information: a unification

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  • Klaus Nehring

    ()
    (Department of Economics, University of California, Davis, CA 95616-8578, USA)

Abstract

While the meaningfulness of the common prior assumption (CPA) under incomplete information has been established recently by various authors, its epistemic rationale has not yet been adequately clarified. To do so, we provide a characterization of the CPA in terms of a new condition called "Mutual Calibration", and argue that it constitutes a more transparent and more primitive formalization of the Harsanyi Doctrine than the existing characterizations. Our analysis unifies the understanding of the CPA under incomplete information and clarifies the role of higher-order expectations and of the difference between situations with only two and those with at least three agents. In the concluding section, the analysis is applied to the problem of defining Bayesian consistency of the intertemporal beliefs of a single-agent with imperfect memory. The CPA yields a notion of "Bayesian updating without a prior".

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Bibliographic Info

Article provided by Springer in its journal Economic Theory.

Volume (Year): 18 (2001)
Issue (Month): 3 ()
Pages: 535-553

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Handle: RePEc:spr:joecth:v:18:y:2001:i:3:p:535-553

Note: Received: March 24, 2000; revised version: April 27, 2000
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Related research

Keywords: Common prior assumption; Harsanyi doctrine; Incomplete information; Imperfect memory.;

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Cited by:
  1. Klaus Nehring, 2003. "Common Priors For Like-Minded Agents," Economics Working Papers 0035, Institute for Advanced Study, School of Social Science.
  2. Nehring, Klaus, 2004. "The veil of public ignorance," Journal of Economic Theory, Elsevier, vol. 119(2), pages 247-270, December.
  3. Adam Dominiak & Jean-Philippe Lefort, 2013. "Agreement theorem for neo-additive beliefs," Economic Theory, Springer, vol. 52(1), pages 1-13, January.

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