English, Article edition: Subjective expected utility in games Di Tillio, Alfredo

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Bookmark: http://trove.nla.gov.au/version/111507
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  • article
Language
  • English

Edition details

Title
  • Subjective expected utility in games
Author
  • Di Tillio, Alfredo
Physical Description
  • article
Notes
  • This paper extends Savage's subjective approach to probability and utility from decision problems under exogenous uncertainty to choice in strategic environments. Interactive uncertainty is modeled both explicitly, using hierarchies of preference relations, the analogue of beliefs hierarchies, and implicitly, using preference structures, the analogue of type spaces a la Harsanyi, and it is shown that the two approaches are equivalent. Preference structures can be seen as those sets of hierarchies arising when certain restrictions on preferences, along with the players' common certainty of the restrictions, are imposed. Preferences are a priori assumed to satisfy only very mild properties (reflexivity, transitivity, and monotone continuity). Thus, the results provide a framework for the analysis of behavior in games under essentially any axiomatic structure. An explicit characterization is given for Savage's axioms, and it is shown that a hierarchy of relatively simple preference relations uniquely identifies the decision maker's utilities and beliefs of all orders. Connections with the literature on beliefs hierarchies and correlated equilibria are discussed.
  • Subjective probability, preference hierarchies, type spaces, beliefs hierarchies, common belief, expected utility, incomplete information, correlated equilibria
  • RePEc:the:publsh:302
Language
  • English
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