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An epistemic characterization of MACA

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  • Xiao Luo

    (National University of Singapore)

  • Ben Wang

    (National University of Singapore)

Abstract

Greenberg et al. (Econ Theory 40:91–112, 2009. https://doi.org/10.1007/s00199-008-0349-5 ) offered a solution concept of a “mutually acceptable course of action” (MACA) for situations in which rational individuals with different beliefs and views of the world agree to a shared course of action. In this paper we investigate epistemic conditions for MACA, in terms of information, beliefs, and rationality. Within a semantic framework, we formulate and show, using the notion of “lexicographic probability system” (LPS) introduced by Blume et al. (Econometrica 59:61–79, 1991a), that MACA is the logical consequence of “perfect” rationality, common belief in “perfect” rationality, and correct mutual belief in agreement on the shared course of action. We also demonstrate how epistemic characterizations for “perfect” versions of solution concepts can be derived from our epistemic characterization for MACA, by varying the degree of completeness of the shared course of action.

Suggested Citation

  • Xiao Luo & Ben Wang, 2022. "An epistemic characterization of MACA," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 73(4), pages 995-1024, June.
    • Handle: RePEc:spr:joecth:v:73:y:2022:i:4:d:10.1007_s00199-021-01341-0
    DOI: 10.1007/s00199-021-01341-0
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