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How hard is it to Control Sequential Elections via the Agenda?

  • Conitzer, Vincent
  • Lang, Jérôme
  • Xia, Lirong
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    Voting on multiple related issues is an important and difficult problem. The key difficulty is that the number of alternatives is exponential in the number of issues, and hence it is infeasible for the agents to rank all the alternatives. A simple approach is to vote on the issues one at a time, in sequence; however, a drawback is that the outcome may depend on the order in which the issues are voted upon and decided, which gives the chairperson some control over the outcome of the election because she can strategically determine the order. While this is undeniably a negative feature of sequential voting, in this paper we temper this judgment by showing that the chairperson’s control problem is, in most cases, computationally hard.

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    File URL: http://basepub.dauphine.fr/xmlui/bitstream/123456789/3899/1/IJCAI09-028.pdf
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    Paper provided by Paris Dauphine University in its series Economics Papers from University Paris Dauphine with number 123456789/3899.

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    Date of creation: Dec 2009
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    Handle: RePEc:dau:papers:123456789/3899
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    1. Steven J. Brams & William S. Zwicker & D. Marc Kilgour, 1998. "The paradox of multiple elections," Social Choice and Welfare, Springer, vol. 15(2), pages 211-236.
    2. Plott, Charles R & Levine, Michael E, 1978. "A Model of Agenda Influence on Committee Decisions," American Economic Review, American Economic Association, vol. 68(1), pages 146-60, March.
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