Party formation in collective decision-making
We study party formation in a general model of collective decisionmaking, modeling parties as agglomerations of policy positions championed by decision-makers. We show that if there are economies of party size and the policy chosen is not beaten by another policy in pairwise voting, then players agglomerate into exactly two parties. This result does not depend on the magnitude of the economies of party size or sensitively on the nature of the individuals' preferences. Our analysis encompasses a wide range of models, including decision-making in committees with costly participation and representative democracy in which the legislature is elected by citizens.
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- Massimo Morelli, 2001.
"Party Formation and Policy Outcomes under Different Electoral Systems,"
Economics Working Papers
0018, Institute for Advanced Study, School of Social Science.
- Massimo Morelli, 2004. "Party Formation and Policy Outcomes under Different Electoral Systems," Review of Economic Studies, Oxford University Press, vol. 71(3), pages 829-853.
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- Jeffrey S. Rosenthal & Martin J. Osborne & Matthew A. Turner, 2000.
"Meetings with Costly Participation,"
American Economic Review,
American Economic Association, vol. 90(4), pages 927-943, September.
- Ignacio Ortuno-Ortin & Anke Gerber, 1998. "Political compromise and endogenous formation of coalitions," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 15(3), pages 445-454.
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