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Policy and the Dynamics of Political Competition

  • MICHAEL LAVER (a1)
Abstract

This paper proposes a model that takes the dynamic agent-based analysis of policy-driven party competition into a multiparty environment. In this, voters continually review party support and switch parties to increase their expectations; parties continually readapt policy positions to the shifting affiliations of voters. Different algorithms for party adaptation are explored, including “Aggregator” (adapt party policy to the ideal policy positions of party supporters), Hunter (repeat policy moves that were rewarded; otherwise make random moves), Predator (move party policy toward the policy position of the largest party), and “Sticker” (never change party policy). Strong trends in the behavior of parties using different methods of adaptation are explored. The model is then applied in a series of experiments to the dynamics of a real party system, described in a published opinion poll time series. This paper reports first steps toward endogenizing key features of the process, including the birth and death of parties, internal party decision rules, and voter ideal points.

Copyright
Corresponding author
Michael Laver is Professor, Department of Politics, New York University, 726 Broadway, 7th Floor, New York, NY 10003-9580 (ml127@nyu.edu).
References
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Axelrod Robert. 1997. The Complexity of Cooperation. Princeton, NJ: Princeton University Press.
Bendor Jonathan, Daniel Diermeier, and Michael Ting. 2003. “Rediscovering Behavioralism: Adaptively Rational Strategic Agents with Endogenous Aspirations.” In Computational Models in Political Economy, ed. Ken Kollman, John H. Miller and Scott E. Page. Cambridge, MA: MIT Press, 21374.
Bhavnani Ravi. 2003. “Adaptive Agents, Political Institutions and Civic Traditions in Modern Italy.” Journal of Artificial Societies and Social Simulation 6: No. 4. Available at: http://www.soc.surrey.ac.uk/JASSS/6/4/1.htm.
Cederman Lars-Erik. 1997. Emergent Actors in World Politics. Princeton, NJ: Princeton University Press.
Coakley John, and Michael Gallagher, eds. 2004. Politics in the Republic of Ireland. 4th Ed. London: Routledge.
Cressman Ross. 2003. Evolutionary Dynamics and Extensive Form Games. Cambridge, MA: MIT Press.
de Marchi Scott. 1999. “Adaptive Models and Electoral Instability.” Journal of Theoretical Politics 11 (July): 393419.
de Marchi. Scott. 2003. “A Computational Model of Voter Sophistication, Ideology and Candidate Position-Taking.” In Computational Models in Political Economy, ed. Ken Kollman, John H. Miller, and Scott E. Page. Cambridge, MA: MIT Press.
Gallagher Michael, and Michael Laver, eds. 1993. How Ireland Voted 1992. Dublin: Folens.
Gallagher Michael, and Richard Sinnott, eds. 1990. How Ireland Voted 1989. Galway: Centre for the Study of Irish Elections.
Jackson John E. 2003. “A Computational Theory of Electoral Competition.” In Computational Models in Political Economy, ed. Ken Kollman, John H. Miller, and Scott E. Page. Cambridge, MA: MIT Press, 10942.
Kitschelt Herbert. 1994. The Transformation of European Social Democracy. Cambridge: Cambridge University Press.
Kollman Ken. 2003. “The Rotating Presidency of the European Council as a Search for Good Policies.” European Union Politics 4 (March): 5174.
Kollman Ken, John Miller, and Scott Page. 1992. “Adaptive Parties in Spatial Elections.” American Political Science Review 86 (December): 92937.
Kollman Ken, John Miller, and Scott Page. 1998. “Political Parties and Electoral Landscapes.” British Journal of Political Science 28 (January): 13958.
Kollman Ken, John H. Miller, and Scott E. Page. 2003. “Political Institutions and Sorting in a Tiebout Model.” In Computational Models in Political Economy, ed. Ken Kollman, John H. Miller, and Scott E. Page. Cambridge, MA: MIT Press, 187212.
Laakso M., and R. Taagepera. 1979. “‘Effective Number’ of Parties: A Measure with Application to Western Europe,” Comparative Political Studies 12 (February): 327.
Laver Michael, and W. Ben Hunt. 1989. Policy and Party Competition. London: Routledg.
Laver Michael, Peter Mair, and Richard Sinnott, eds. 1987. How Ireland Voted: The General Election of 1987. Swords: Poolbeg Press.
Marsh Michael, and Paul Mitchell. Eds. 1999. How Ireland Voted 1997. Boulder, CO: Westview Press.
Moss Scott. 2001. “Game Theory: Limitations and an Alternative.” Journal of Artificial Societies and Social Simulation 4; No. 2. Available at: http://www.soc.surrey.ac.uk/JASSS/4/2/2.htm.
Müller Wolfgang, and Kaare Strøm. 1999. “Conclusions: Party Behavior and Representative Democracy.” In Policy, Office or Votes? How Political Parties in Western Europe Make Hard Decisions, ed. Wolfgang Müller and Kaare Strøm. Cambridge: Cambridge University Press, 279309.
Nowack M., and K. Sigmund. 1993. “A Strategy of Win-Stay, Lose-Shift That Outperforms Tit-for-Tat in the Prisoners' Dilemma Game.” Nature 364: 5658.
Schofield Norman. 2003. “Valence Competition in the Spatial Stochastic Model.” Journal of Theoretical Politics 15 (October): 37183.
Schreiber Darren. 2002. “The Emergence of Parties: An Agent Based Simulation.” Thesis. University of California, Los Angeles.
Skyrms Brian, 1996. Evolution of the Social Contract. Cambridge: Cambridge University Press.
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American Political Science Review
  • ISSN: 0003-0554
  • EISSN: 1537-5943
  • URL: /core/journals/american-political-science-review
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