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Strategic Power Revisited

  • Stefan Napel
  • Mika Widgrén

Traditional power indices ignore preferences and strategic interaction. Equilibrium analysis of particular non-cooperative decision procedures is unsuitable for normative analysis and assumes typically unavailable information. These points drive a lingering debate about the right approach to power analysis. A unified framework that works both sides of the street is developed here. It rests on a notion of a posteriori power which formalizes players' marginal impact to outcomes in cooperative and non-cooperative games, for strategic interaction and purely random behaviour. Taking expectations with respect to preferences, actions, and procedures then defines a meaningful a priori measure. Established indices turn out to be special cases.

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File URL: http://www.cesifo-group.de/portal/page/portal/DocBase_Content/WP/WP-CESifo_Working_Papers/wp-cesifo-2002/wp-cesifo-2002-05/736.pdf
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Paper provided by CESifo Group Munich in its series CESifo Working Paper Series with number 736.

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Date of creation: 2002
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Handle: RePEc:ces:ceswps:_736
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  1. Moshé Machover & Dan S. Felsenthal, 2001. "The Treaty of Nice and qualified majority voting," Social Choice and Welfare, Springer, vol. 18(3), pages 431-464.
  2. Moser, Peter, 1997. " A Theory of the Conditional Influence of the European Parliament in the Cooperation Procedure," Public Choice, Springer, vol. 91(3-4), pages 333-50, June.
  3. Sergiu Hart & Andreu Mas-Colell, 1994. "Bargaining and value," Economics Working Papers 114, Department of Economics and Business, Universitat Pompeu Fabra, revised Feb 1995.
  4. Sven Hansson, 1996. "Social choice with procedural preferences," Social Choice and Welfare, Springer, vol. 13(2), pages 215-230, April.
  5. Mika Widgrén & Stefan Napel, 2001. "Inferior players in simple games," International Journal of Game Theory, Springer, vol. 30(2), pages 209-220.
  6. Gul, Faruk, 1989. "Bargaining Foundations of Shapley Value," Econometrica, Econometric Society, vol. 57(1), pages 81-95, January.
  7. Hosli, Madeleine O., 1993. "Admission of European Free Trade Association states to the European Community: effects on voting power in the European Community Council of Ministers," International Organization, Cambridge University Press, vol. 47(04), pages 629-643, September.
  8. Philip Straffin, 1977. "Homogeneity, independence, and power indices," Public Choice, Springer, vol. 30(1), pages 107-118, June.
  9. Annick Laruelle & Mika Widgrén, 1998. "Is the allocation of voting power among EU states fair?," Public Choice, Springer, vol. 94(3), pages 317-339, March.
  10. Baldwin, Richard & Berglöf, Erik & Giavazzi, Francesco & Widgrén, Mika, 2000. "EU Reforms for Tomorrow’s Europe," CEPR Discussion Papers 2623, C.E.P.R. Discussion Papers.
  11. Guillermo Owen, 1972. "Multilinear Extensions of Games," Management Science, INFORMS, vol. 18(5-Part-2), pages 64-79, January.
  12. Leech, Dennis, 2002. " Designing the Voting System for the Council of the European Union," Public Choice, Springer, vol. 113(3-4), pages 437-64, December.
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