Strategy-proof rules for two public goods: double median rules

Eun Jeong Heo

Social Choice and Welfare, 2013, vol. 41, issue 4, 895-922

Abstract: We consider the problem of selecting the locations of two (identical) public goods on an interval. Each agent has preferences over pairs of locations, which are induced from single-peaked rankings over single locations: each agent compares pairs of locations by comparing the location he ranks higher in each pair. We introduce a class of “double median rules” and characterize it by means of continuity, anonymity, strategy-proofness, and users only. To each pair of parameter sets, each set in the pair consisting of $$(n+1)$$ parameters, is associated a rule in the class. It is the rule that selects, for each preference profile, the medians of the peaks and the parameters belonging to each set in the pair. We identify the subclasses of the double median rules satisfying group strategy-proofness, weak efficiency, and double unanimity (or efficiency), respectively. We also discuss the classes of “multiple median rules” and “non-anonymous double median rules”. Copyright Springer-Verlag Berlin Heidelberg 2013

Date: 2013
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DOI: 10.1007/s00355-012-0713-z

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