English, Article, Journal or magazine article edition: Stable Coalition-Governments: The Case of Three Political Parties M. Socorro Puy

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Physical Description
  • preprint
Language
  • English

Edition details

Title
  • Stable Coalition-Governments: The Case of Three Political Parties
Author
  • M. Socorro Puy
Physical Description
  • preprint
Notes
  • We explore to what extent we can propose fixed negotiation rules as well as simple mechanisms (or protocols) that guarantee that politi¬cal parties can form stable coalition-governments. We analyze the case where three parties can hold office in the form of two-party coalitions. We define the family of Weighted Rules, that select political agree¬ments as a function of the bliss-points of the parties, and electoral results (Camson's Law and equal-share among others are included). We show that every weighted rule yields a stable coalition. We make use of the theory of implementation to design a protocol (in the form of a mechanism) that guarantees that a stable coalition will govern. We find that no dominant-solvable mechanism can be used for this purpose, but there is a simultaneous-unanimity mechanism that im¬plements it in Nash and strong Nash equilibrium.
  • Coalition-government, Stability, Nash-implementation
  • RePEc:mal:wpaper:2009-3
Language
  • English
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