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Size Reduction Reform in German Parliament: a game theoretic analysis of power indices in the Bundestag

Author

Listed:
  • Papatya Duman

    (Paderborn University)

  • Claus-Jochen Haake

    (Paderborn University)

Abstract

We investigate whether the recently approved reforms of the apportionment of parliamentary seats to parties in the German Bundestag affects the parties’ political influence measured by power indices. We find that under neither reform the underlying simple game, which describes the possibilities to form governments, remains unchanged and as a result the Shapley-Shubik and the Banzhaf index are unaltered. As a consequence, the major change from the reforms is the size reduction in the Bundestag by currently 106 legislators to 630.

Suggested Citation

  • Papatya Duman & Claus-Jochen Haake, 2024. "Size Reduction Reform in German Parliament: a game theoretic analysis of power indices in the Bundestag," Working Papers CIE 158, Paderborn University, CIE Center for International Economics.
    • Handle: RePEc:pdn:ciepap:158
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    File URL: http://groups.uni-paderborn.de/wp-wiwi/RePEc/pdf/ciepap/WP158.pdf
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    More about this item

    Keywords

    Reform Bundestag; Banzhaf power index; Shapley-Shubik power index;
    All these keywords.

    JEL classification:

    • D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Political Processes: Rent-seeking, Lobbying, Elections, Legislatures, and Voting Behavior
    • C71 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Cooperative Games

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