The Interpretation of the Laakso-Taagepera Effective Number of Parties

Jean-François Caulier ()

Documents de travail du Centre d'Economie de la Sorbonne from Université Panthéon-Sorbonne (Paris 1), Centre d'Economie de la Sorbonne

Abstract: In this paper, we present a general statistical framework within which we can draw a new interpretation of the Laakso-Taagepera effective number of parties fragmentation index. With the particular method of sampling with probability proportional to the party sizes, we show that the Laakso-Taagepera effective number of parties is the inverse of the size biased version of the traditional expected party size in shares. Further, we provide an axiomatic definition of the Laakso-Taagepera effective number of parties

Keywords: Fragmentation; effective number of parties; concentration index; size biased sampling; length biased sampling (search for similar items in EconPapers)
JEL-codes: C65 D71 D72 (search for similar items in EconPapers)
Pages: 21 pages
Date: 2011-02
New Economics Papers: this item is included in nep-cdm and nep-cis
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Citations: View citations in EconPapers (1)

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http://mse.univ-paris1.fr/pub/mse/CES2011/11006.pdf (application/pdf)

Related works:
Working Paper: The Interpretation of the Laakso-Taagepera Effective Number of Parties (2011)
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Persistent link: https://EconPapers.repec.org/RePEc:mse:cesdoc:11006

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