Convergence to Equilibria in Plurality Voting
OA Location
Author(s)
Meir, Reshef
Polukarov, Maria
Rosenschein, Jeffrey S
Jennings, Nicholas R
Type
Conference Paper
Abstract
Multi-agent decision problems, in which independent agents have to agree on a joint plan of action or allocation of resources, are central to AI. In such situations, agents’ individual preferences over available alternatives may vary, and they may try to reconcile these differences by voting. Based on the fact that agents may have incentives to vote strategically and misreport their real preferences, a number of recent papers have explored different possibilities for avoiding or eliminating such manipulations. In contrast to most prior work, this paper focuses on convergence of strategic behavior to a decision from which no voter will want to deviate. We consider scenarios where voters cannot coordinate their actions, but are allowed to change their vote after observing the current outcome. We focus on the Plurality voting rule, and study the conditions under which this iterative game is guaranteed to converge to a Nash equilibrium (i.e., to a decision that is stable against further unilateral manipulations). We show for the first time how convergence depends on the exact attributes of the game, such as the tie-breaking scheme, and on assumptions regarding agents’ weights and strategies.
Date Issued
2010-07
Citation
Proc. of 24th Conference on Artificial Intelligence (AAAI-10), 2010, pp.823-828
Start Page
823
End Page
828
Journal / Book Title
Proc. of 24th Conference on Artificial Intelligence (AAAI-10)
Copyright Statement
© 2010, Association for the Advancement of Artificial Intelligence (www.aaai.org). All rights reserved.
Identifier
http://eprints.soton.ac.uk/270852/
Source
Proc 24th National Conference on AI (AAAI)
Source Place
Atlanta, Georgia
Publication Status
Unpublished
Start Date
2010-07-11
Finish Date
2010-07-15