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Impartial Selection and the Power of Up to Two Choices

Published: 22 December 2017 Publication History

Abstract

We study mechanisms that select members of a set of agents based on nominations by other members and that are impartial in the sense that agents cannot influence their own chance of selection. Prior work has shown that deterministic mechanisms for selecting any fixed number k of agents are severely limited and cannot extract a constant fraction of the nominations of the k most highly nominated agents. We prove here that this impossibility result can be circumvented by allowing the mechanism to sometimes but not always select fewer than k agents. This added flexibility also improves the performance of randomized mechanisms, for which we show a separation between mechanisms that make exactly two or up to two choices and give upper and lower bounds for mechanisms allowed more than two choices.

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Cited By

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  • (2024)Deterministic Impartial Selection with WeightsACM Transactions on Economics and Computation10.1145/367717712:3(1-22)Online publication date: 6-Sep-2024
  • (2024)Impartial selection with additive guarantees via iterated deletionGames and Economic Behavior10.1016/j.geb.2024.01.008144(203-224)Online publication date: Mar-2024
  • (2024)Manipulation and peer mechanisms: A surveyArtificial Intelligence10.1016/j.artint.2024.104196336(104196)Online publication date: Nov-2024
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Published In

cover image ACM Transactions on Economics and Computation
ACM Transactions on Economics and Computation  Volume 5, Issue 4
Special Issue on Wine'15
November 2017
146 pages
ISSN:2167-8375
EISSN:2167-8383
DOI:10.1145/3174276
Issue’s Table of Contents
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than the author(s) must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected].

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 22 December 2017
Accepted: 01 March 2017
Revised: 01 December 2016
Received: 01 July 2016
Published in TEAC Volume 5, Issue 4

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Author Tags

  1. Mechanism design
  2. impartial selection

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