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Rethinking common belief, revision, and backward induction

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  • Rich, Patricia

Abstract

Whether rationality and common belief in rationality jointly entail the backward inductive outcome in centipede games has long been debated. Stalnaker’s compelling negative argument appeals to the AGM belief revision postulates to argue that off-path moves may be rational, given the revisions they may prompt. I counter that the structure of common belief and the principles of AGM justify an additional assumption about revision. I then prove that, given my proposed constraint, for all finite, n-player, extensive form, perfect information games with a unique backward inductive solution, if there is initial common belief in rationality, then backward induction is guaranteed.

Suggested Citation

  • Rich, Patricia, 2015. "Rethinking common belief, revision, and backward induction," Mathematical Social Sciences, Elsevier, vol. 75(C), pages 102-114.
    • Handle: RePEc:eee:matsoc:v:75:y:2015:i:c:p:102-114
    DOI: 10.1016/j.mathsocsci.2015.03.001
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    References listed on IDEAS

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