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Vote Trading With and Without Party Leaders

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  • Casella, Alessandra
  • Palfrey, Thomas R
  • Turban, Sébastien

Abstract

Two groups of voters of known sizes disagree over a single binary decision to be taken by simple majority. Individuals have different, privately observed intensities of preferences and before voting can buy or sell votes among themselves for money. We study the implication of such trading for outcomes and welfare when trades are coordinated by the two group leaders and when they take place anonymously in a competitive market. The theory has strong predictions. In both cases, trading falls short of full efficiency, but for opposite reasons: with group leaders, the minority wins too rarely; with market trades, the minority wins too often. As a result, with group leaders, vote trading improves over no-trade; with market trades, vote trading can be welfare reducing. All predictions are strongly supported by experimental results.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 8848.

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Date of creation: Feb 2012
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Handle: RePEc:cpr:ceprdp:8848

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Keywords: Bargaining; Competitive equilibrium; Experiments; Votes market; Voting;

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  1. Radner, Roy & Schotter, Andrew, 1987. "The Sealed-Bid Mechanism: An Experimental Study," Working Papers 87-41, C.V. Starr Center for Applied Economics, New York University.
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