Strategic Voting Under Uncertainty About the Voting Method

Much of the theoretical work on strategic voting makes strong assumptions about what voters know about the voting situation. A strategizing voter is typically assumed to know how other voters will vote and to know the rules of the voting method. A growing body of literature explores strategic voting...

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Main Authors: Wesley H. Holliday, Eric Pacuit
Format: Article
Language:English
Published: Open Publishing Association 2019-07-01
Series:Electronic Proceedings in Theoretical Computer Science
Online Access:http://arxiv.org/pdf/1907.09110v1
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author Wesley H. Holliday
Eric Pacuit
author_facet Wesley H. Holliday
Eric Pacuit
author_sort Wesley H. Holliday
collection DOAJ
description Much of the theoretical work on strategic voting makes strong assumptions about what voters know about the voting situation. A strategizing voter is typically assumed to know how other voters will vote and to know the rules of the voting method. A growing body of literature explores strategic voting when there is uncertainty about how others will vote. In this paper, we study strategic voting when there is uncertainty about the voting method. We introduce three notions of manipulability for a set of voting methods: sure, safe, and expected manipulability. With the help of a computer program, we identify voting scenarios in which uncertainty about the voting method may reduce or even eliminate a voter's incentive to misrepresent her preferences. Thus, it may be in the interest of an election designer who wishes to reduce strategic voting to leave voters uncertain about which of several reasonable voting methods will be used to determine the winners of an election.
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spelling doaj.art-5cc2e34d8bc348b1bac74e65520dcb652022-12-21T19:18:14ZengOpen Publishing AssociationElectronic Proceedings in Theoretical Computer Science2075-21802019-07-01297Proc. TARK 201925227210.4204/EPTCS.297.17:44Strategic Voting Under Uncertainty About the Voting MethodWesley H. Holliday0Eric Pacuit1 University of California, Berkeley University of Maryland Much of the theoretical work on strategic voting makes strong assumptions about what voters know about the voting situation. A strategizing voter is typically assumed to know how other voters will vote and to know the rules of the voting method. A growing body of literature explores strategic voting when there is uncertainty about how others will vote. In this paper, we study strategic voting when there is uncertainty about the voting method. We introduce three notions of manipulability for a set of voting methods: sure, safe, and expected manipulability. With the help of a computer program, we identify voting scenarios in which uncertainty about the voting method may reduce or even eliminate a voter's incentive to misrepresent her preferences. Thus, it may be in the interest of an election designer who wishes to reduce strategic voting to leave voters uncertain about which of several reasonable voting methods will be used to determine the winners of an election.http://arxiv.org/pdf/1907.09110v1
spellingShingle Wesley H. Holliday
Eric Pacuit
Strategic Voting Under Uncertainty About the Voting Method
Electronic Proceedings in Theoretical Computer Science
title Strategic Voting Under Uncertainty About the Voting Method
title_full Strategic Voting Under Uncertainty About the Voting Method
title_fullStr Strategic Voting Under Uncertainty About the Voting Method
title_full_unstemmed Strategic Voting Under Uncertainty About the Voting Method
title_short Strategic Voting Under Uncertainty About the Voting Method
title_sort strategic voting under uncertainty about the voting method
url http://arxiv.org/pdf/1907.09110v1
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