Democracy Undone. Systematic Minority Advantage in Competitive Vote Markets
AbstractWe study the competitive equilibrium of a market for votes where voters can trade votes for a numeraire before making a decision via majority rule. The choice is binary and the number of supporters of either alternative is known. We identify a sufficient condition guaranteeing the existence of an ex ante equilibrium. In equilibrium, only the most intense voter on each side demands votes and each demand enough votes to alone control a majority. The probability of a minority victory is independent of the size of the minority and converges to one half, for any minority size, when the electorate is arbitrarily large. In a large electorate, the numerical advantage of the majority becomes irrelevant: democracy is undone by the market.
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Bibliographic InfoPaper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 9242.
Date of creation: Dec 2012
Date of revision:
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Other versions of this item:
- Alessandra Casella & Sébastien Turban, 2012. "Democracy Undone. Systematic Minority Advantage in Competitive Vote Markets," NBER Working Papers 18573, National Bureau of Economic Research, Inc.
- C62 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Existence and Stability Conditions of Equilibrium
- C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
- D70 - Microeconomics - - Analysis of Collective Decision-Making - - - General
- D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Political Processes: Rent-seeking, Lobbying, Elections, Legislatures, and Voting Behavior
- P16 - Economic Systems - - Capitalist Systems - - - Political Economy of Capitalism
This paper has been announced in the following NEP Reports:
- NEP-ALL-2012-12-22 (All new papers)
- NEP-CDM-2012-12-22 (Collective Decision-Making)
- NEP-POL-2012-12-22 (Positive Political Economics)
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