The Proportional Veto Principle for Approval Ballots

Daniel Halpern, Ariel D. Procaccia and Warut Suksompong

Papers from arXiv.org

Abstract: The proportional veto principle, which captures the idea that a candidate vetoed by a large group of voters should not be chosen, has been studied for ranked ballots in single-winner voting. We introduce a version of this principle for approval ballots, which we call flexible-voter representation (FVR). We show that while the approval voting rule and other natural scoring rules provide the optimal FVR guarantee only for some flexibility threshold, there exists a scoring rule that is FVR-optimal for all thresholds simultaneously. We also extend our results to multi-winner voting.

Date: 2025-05
New Economics Papers: this item is included in nep-des and nep-mic
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