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Three Layers of Uncertainty: an Experiment

Author

Listed:
  • Ilke Aydogan

    (Department of Economics, Bocconi University)

  • Lo?c Berger

    (IESEG School of Management and Bocconi University)

  • Valentina Bosetti

    (Department of Economics, Bocconi University and Fondazione Eni Enrico Mattei (FEEM))

  • Ning Liu

    (Department of Economics, Bocconi University)

Abstract

We experimentally explore decision-making under uncertainty using a framework that decomposes uncertainty into three distinct layers: (1) physical uncertainty, entailing inherent randomness within a given probability model, (2) model uncertainty, entailing subjective uncertainty about the probability model to be used and (3) model misspecification, entailing uncertainty about the presence of the true probability model among the set of models considered. Using a new experimental design, we measure individual attitudes towards these different layers of uncertainty and study the distinct role of each of them in characterizing ambiguity attitudes. In addition to providing new insights into the underlying processes behind ambiguity aversion -failure to reduce compound probabilities or distinct attitudes towards unknown probabilities- our study provides the first empirical evidence for the intermediate role of model misspecification between model uncertainty and Ellsberg in decision-making under uncertainty.

Suggested Citation

  • Ilke Aydogan & Lo?c Berger & Valentina Bosetti & Ning Liu, 2018. "Three Layers of Uncertainty: an Experiment," Working Papers 2018.24, Fondazione Eni Enrico Mattei.
  • Handle: RePEc:fem:femwpa:2018.24
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    References listed on IDEAS

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    More about this item

    Keywords

    Ambiguity Aversion; Reduction of Compound Lotteries; Non-expected Utility; Model Uncertainty; Model Misspecification;
    All these keywords.

    JEL classification:

    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty

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