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Bounded response of aggregated preferences

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  • Muto, Nozomu
  • Sato, Shin

Abstract

We propose a new axiom called bounded response, which says that the smallest change in an agent’s preference leads to the smallest or no change in the aggregated preference in the society. This axiom can be interpreted as continuity or insensitivity of aggregated preferences with respect to the reported preferences. We show that bounded response together with a weak axiom imply dictatorship whenever there are four or more alternatives. This result shows that the continuity or the insensitivity of aggregated preferences, formulated as bounded response, with respect to the reported preferences is achieved only by dictatorship. Our result also offers a new perspective on Arrow’s theorem: neither independence property nor informational efficiency in independence of irrelevant alternatives is necessary for the impossibility. Our result has an interesting implication also for “individual” problem of formulating an aggregated preference based on several criteria. A new technique is employed in the proof.

Suggested Citation

  • Muto, Nozomu & Sato, Shin, 2016. "Bounded response of aggregated preferences," Journal of Mathematical Economics, Elsevier, vol. 65(C), pages 1-15.
    • Handle: RePEc:eee:mateco:v:65:y:2016:i:c:p:1-15
    DOI: 10.1016/j.jmateco.2016.04.006
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    References listed on IDEAS

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    Cited by:

    1. Stergios, Athanasoglou, 2017. "An investigation of weak-veto rules in preference aggregation," Working Papers 363, University of Milano-Bicocca, Department of Economics, revised 18 Feb 2017.
    2. Susumu Cato, 2019. "The possibility of Paretian anonymous decision-making with an infinite population," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 53(4), pages 587-601, December.
    3. Cato, Susumu, 2017. "Unanimity, anonymity, and infinite population," Journal of Mathematical Economics, Elsevier, vol. 71(C), pages 28-35.
    4. Nozomu Muto & Shin Sato, 2016. "A decomposition of strategy-proofness," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 47(2), pages 277-294, August.
    5. Muto, Nozomu & Sato, Shin, 2017. "An impossibility under bounded response of social choice functions," Games and Economic Behavior, Elsevier, vol. 106(C), pages 1-15.

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