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Heterogeneous Awareness and the Possibility of Agreement

Author

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  • Ewerhart, Christian

    (Deutsche Börse AG)

Abstract

This paper explores the consequences of assuming that agents may be unaware of certain outcomes in the state space. One way to construct such a setting is from what we call awareness types. When agents possess limited awareness of the state space, information may be delusive, but agents can still not commonly believe to have different posteriors. The paper also discusses the properties of knowledge under limited awareness. E.g., it is shown that an ignorant agent\ is aware of his ignorance if and only if he knows that he is ignorant. When the state space is sufficiently rich, state awareness satisfies plausibility, AU-introspection, and KU-introspection.

Suggested Citation

  • Ewerhart, Christian, 2001. "Heterogeneous Awareness and the Possibility of Agreement," Sonderforschungsbereich 504 Publications 01-30, Sonderforschungsbereich 504, Universität Mannheim;Sonderforschungsbereich 504, University of Mannheim.
    • Handle: RePEc:xrs:sfbmaa:01-30
    Note: Financial support from the Deutsche Forschungsgemeinschaft, SFB 504, at the University of Mannheim, is gratefully acknowledged.
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    Cited by:

    1. Spyros Galanis, 2013. "Unawareness of theorems," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 52(1), pages 41-73, January.
    2. Heifetz, Aviad & Meier, Martin & Schipper, Burkhard C., 2008. "A canonical model for interactive unawareness," Games and Economic Behavior, Elsevier, vol. 62(1), pages 304-324, January.
    3. Heifetz, Aviad & Meier, Martin & Schipper, Burkhard C., 2003. "Interactive Unawareness and Speculative Trade," Bonn Econ Discussion Papers 17/2003, University of Bonn, Bonn Graduate School of Economics (BGSE).
    4. Galanis, Spyros, 2007. "Unawareness of theorems," Discussion Paper Series In Economics And Econometrics 51816, Economics Division, School of Social Sciences, University of Southampton.
    5. Heifetz, Aviad & Meier, Martin & Schipper, Burkhard C., 2013. "Unawareness, beliefs, and speculative trade," Games and Economic Behavior, Elsevier, vol. 77(1), pages 100-121.
    6. Heifetz, Aviad & Meier, Martin & Schipper, Burkhard C., 2008. "A canonical model for interactive unawareness," Games and Economic Behavior, Elsevier, vol. 62(1), pages 304-324, January.
    7. Yoshihiko Tada, 2024. "AU Introspection and Symmetry under non-trivial unawareness," Theory and Decision, Springer, vol. 97(2), pages 409-421, September.
    8. Heifetz, Aviad & Meier, Martin & Schipper, Burkhard C., 2013. "Unawareness, beliefs, and speculative trade," Games and Economic Behavior, Elsevier, vol. 77(1), pages 100-121.
    9. Heifetz, Aviad & Meier, Martin & Schipper, Burkhard C., 2006. "Interactive unawareness," Journal of Economic Theory, Elsevier, vol. 130(1), pages 78-94, September.
    10. Spyros Galanis, 2011. "Syntactic foundations for unawareness of theorems," Theory and Decision, Springer, vol. 71(4), pages 593-614, October.
    11. Heifetz, Aviad & Meier, Martin & Schipper, Burkhard C., 2013. "Unawareness, beliefs, and speculative trade," Games and Economic Behavior, Elsevier, vol. 77(1), pages 100-121.
    12. Feinberg, Yossi, 2005. "Games with Incomplete Awareness," Research Papers 1894, Stanford University, Graduate School of Business.

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