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Minimax regret with imperfect ex-post knowledge of the state

Author

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  • Giacomo Bonanno

    (Department of Economics, University of California Davis)

Abstract

We consider decision problems under complete ignorance and extend the minimax regret principle to situations where, after taking an action, the decision maker does not necessarily learn the state of the world. For example, if the decision maker only learns what the outcome is, then all she knows is that the actual state is one of the possibly several states that yield the observed outcome under the chosen action. We refer to this situation as imperfect ex-post information. We also extend the framework to encompass the possibility of less than the extreme pessimism that characterizes the minimax regret criterion.

Suggested Citation

  • Giacomo Bonanno, 2021. "Minimax regret with imperfect ex-post knowledge of the state," Working Papers 343, University of California, Davis, Department of Economics.
    • Handle: RePEc:cda:wpaper:343
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    File URL: https://repec.dss.ucdavis.edu/files/BdYMgsQmmt3Xi78j8ubveQKj/Regret.pdf
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    References listed on IDEAS

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    More about this item

    Keywords

    Regret; minimax; pessimism; Hurwicz index;
    All these keywords.

    JEL classification:

    • C0 - Mathematical and Quantitative Methods - - General
    • D0 - Microeconomics - - General

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