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Coalition building and the power index of parties in this process
Dátum pridania: 01.05.2003 Oznámkuj: 12345
Autor referátu: lehu
Jazyk: Angličtina Počet slov: 3 851
Referát vhodný pre: Stredná odborná škola Počet A4: 13
Priemerná známka: 2.96 Rýchle čítanie: 21m 40s
Pomalé čítanie: 32m 30s
Kristina Stefanova & Michal Lehuta

International University Bremen
14 April 2003
1 Introduction
Coalition Building or “the process of uniting different political actors or organizations in the pursuit of some common goal ” constitutes one of the most fundamental political problems. Political coalitions might consist of individual legislators, parties that want to control of the executive branch, or states united in an international action. In a coalition the actors are fully committed and invest all their resources, such as votes, money or soldiers for the achievement of goals that might not be completely their own. At the end they distribute the gains among them.
Sometimes the participants in a coalition might disagree over what result they expect after organizing the collective action and therefore the question why and in which conditions would coalitions form and survive is a substantial one for predicting and understanding the behavior of various political players.
This essay concentrates mainly on interparty executive coalitions in parliamentary democracies – in other words, parties that seek to control a cabinet responsible to a parliamentary or legislative majority. In the course of describing this process we present the most famous theories on coalition building, which are accompanied with some of the incentives that make parties build certain types of coalitions. Together with showing the political side of this political process, we turn our attention also to the mathematical point of view, which describes parties’ influence in coalition building by a power index. Various people have pondered over the question what makes a party strong in relation to other political players, which lead to the emergence of numerous indices. We look at some of the most important and frequently mentioned in this respect.

When are political coalitions built?
In parliamentary systems that have two dominant parties (Conservatives and Labor in Britain), one of the parties always holds a majority of the seats in the legislature and does not need to build a coalition. In such conditions there are coalitions within the dominant parties, like the one between northern and southern democrats.
In cases where none of the parties has the majority of the parliamentary seats it must necessarily build a coalition. Sometimes the cabinet consists only of representatives of one party although members of other parties support it in debates.
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Zdroje: 1. Bilal, Sanoussi, Paul Albuquerque and Madeleine O. Hosli. 2001. “The Probability of Coalition Formation: Spatial Voting Power Indices”. Retrieved: April 4, 2003. , 2. Felsenthal, D. and Moshe Machover. 1998. The Measurement of Voting Power. Theory and Practice, Problems and Paradoxes. Cheltenham: Edward Elgar., 3. Holler, M. 2002. “How to sell power indices”. Retrieved: April 7, 2003. , 4. Lijphart, A. 1999. Patterns of democracy government forms and performance in thirty-six countries. New Haven: Conn. London Yale University Press., 5. Pajala, A. “The Voting Power and Power Index Website”. Retrieved: April 11, 2003. , 6. Saari, D. 2001. Chaotic Elections! – A Mathematician Looks at Voting. American Mathematical Society., 7. Shapley, Lloyd S. and Martin Shubik. 1954. “A Method for Evaluating the Distribution of Power in a Committee System” American Political Science Review, 48, 787-92., 8. Strom, K. “Coalition building”. In: Encyclopedia of Democracy: 255-258.
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