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Collective choices under ambiguity

Author

Listed:
  • Maria Vittoria Levati

    () (Department of Economics (University of Verona))

  • Stefan Napel

    () (University of Bayreuth)

  • Ivan Soraperra

    () (Department of Economics (University of Verona))

Abstract

We investigate experimentally whether collective choice matters for individual attitudes to ambiguity. We consider a two-urn Ellsberg experiment: one urn offers a 45% chance of winning a fixed monetary prize, the other an ambiguous chance. Participants choose either individually or in groups of three. Group decision rules vary. In one treatment the collective choice is taken by majority; in another it is dictated by two group members; in the third it is dictated by a single group member. We observe high proportions of ambiguity averse choices in both individual and collective decision making. Although a majority of participants display consistent ambiguity attitudes across their decisions, collective choice tends to foster ambiguity aversion, especially if the decision rule assigns asymmetric responsibilities to group members. Previous participation in laboratory experiments may miti- gate this.
(This abstract was borrowed from another version of this item.)

Suggested Citation

  • Maria Vittoria Levati & Stefan Napel & Ivan Soraperra, 2014. "Collective choices under ambiguity," Working Papers 13/2014, University of Verona, Department of Economics.
  • Handle: RePEc:ver:wpaper:13/2014
    as

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    References listed on IDEAS

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    Cited by:

    1. Enrica Carbone & Konstantinos Georgalos & Gerardo Infante, 2016. "Individual vs. Group Decision Making: an Experiment on Dynamic Choice under Risk and Ambiguity," Working Papers 138739716, Lancaster University Management School, Economics Department.

    More about this item

    Keywords

    Ambiguity aversion; majority voting; dictatorship;

    JEL classification:

    • C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
    • C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior
    • D71 - Microeconomics - - Analysis of Collective Decision-Making - - - Social Choice; Clubs; Committees; Associations
    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty

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