ON STRATEGY‐PROOFNESS AND THE SALIENCE OF SINGLE‐PEAKEDNESS. (23rd January 2018)

• Record Type: Journal Article
• Authors: Chatterji, Shurojit; Massó, Jordi
• Is Part Of: International economic review. Volume 59:Number 1(2018:Feb.)
• Page Start: 163
• Page End: 189
• Publication Date: 2018-01-23
• Subjects: Economics -- Periodicals; 330.05
• DOI: 10.1111/iere.12266
• Languages: English
• ISSNs: 0020-6598

Abstract

Abstract: We consider strategy‐proof rules operating on a rich domain of preference profiles. We show that if the rule satisfies in addition tops‐onlyness, anonymity, and unanimity, then the preferences in the domain have to satisfy a variant of single‐peakedness (referred to as semilattice single‐peakedness). We do so by deriving from the rule an endogenous partial order (a semilattice) from which the concept of a semilattice single‐peaked preference can be defined. We also provide a converse of this main finding. Finally, we show how well‐known restricted domains under which nontrivial strategy‐proof rules are admissible are semilattice single‐peaked domains.