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Condorcet consistent scoring rules and single-peakedness

Dolors Berga, Guadalupe Correa-Lopera and Bernardo Moreno ()

Economics Letters, 2019, vol. 181, issue C, 199-202

Abstract: We study voting problems with an odd number of agents and single-peaked preferences. With only three alternatives, there are scoring rules that yield the Condorcet winner only for committees of three and five agents. With four or more alternatives, only committees of three agents work. In all these scoring rules, the best and worst alternatives are assigned a score of 1and 0, respectively, and any middle alternative a score between 0 and 12. For five or more alternatives, the score of any middle alternative must be the same, and we call this family semiplurality scoring rules.

Keywords: Scoring rule; Condorcet winner; Single-peakedness; Semiplurality rule (search for similar items in EconPapers)
JEL-codes: D71 D72 (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1016/j.econlet.2019.05.028

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