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The ex-ante aggregation of opinions under uncertainty

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  • Nascimento, Leandro

    ()
    (Department of Economics, New York University)

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    Abstract

    This paper presents an analysis of the problem of aggregating preference orderings under subjective uncertainty. Individual preferences, or opinions, agree on the ranking of risky prospects, but are quite general because we do not specify the perception of ambiguity or the attitude towards it. A convexity axiom for the ex-ante preference characterizes a (collective) decision rule that can be interpreted as a compromise between the utilitarian and the Rawlsian criteria. The former is characterized by the independence axiom as in Harsanyi (1955). Existing results are special cases of our representation theorems, which also allow us to interpret Segal's (1987) two-stage approach to ambiguity as the ex-ante aggregation of (Bayesian) future selves' opinions.

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    Bibliographic Info

    Article provided by Econometric Society in its journal Theoretical Economics.

    Volume (Year): 7 (2012)
    Issue (Month): 3 (September)
    Pages:

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    Handle: RePEc:the:publsh:896

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    Web page: http://econtheory.org

    Related research

    Keywords: Aggregation of preferences; uncertainty;

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    References

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    Cited by:
    1. Nascimento, Leandro, 2011. "Zhou’s aggregation theorems with multiple welfare weights," Journal of Mathematical Economics, Elsevier, vol. 47(4-5), pages 654-658.
    2. Faro, José Heleno & Lefort, Jean Philippe, 2013. "Dynamic Objective and Subjective Rationality," Insper Working Papers wpe_312, Insper Working Paper, Insper Instituto de Ensino e Pesquisa.

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