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Seat Shares of All Parties and the Effective Number of Parties

Rein Taagepera

in Predicting Party Sizes: The Logic of Simple Electoral Systems

Published in print:
2007
Published Online:
September 2007
ISBN:
9780199287741
eISBN:
9780191713408
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199287741.003.0009
Subject:
Political Science, Democratization

As with Chapter 8, the ‘seat product’ is the important quantity to watch. The effective number of parties represented in the assembly is approximately the sixth root of the seat product. The average ... More


How to Simplify Complex Electoral Systems

Rein Taagepera

in Predicting Party Sizes: The Logic of Simple Electoral Systems

Published in print:
2007
Published Online:
September 2007
ISBN:
9780199287741
eISBN:
9780191713408
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199287741.003.0011
Subject:
Political Science, Democratization

Resistance to simplifying a complex electoral system is at its least when the existing number and size of parties are not altered. The existing effective number of parties is most likely to be ... More


The Institutional Impact on Votes and Deviation from PR

Rein Taagepera

in Predicting Party Sizes: The Logic of Simple Electoral Systems

Published in print:
2007
Published Online:
September 2007
ISBN:
9780199287741
eISBN:
9780191713408
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199287741.003.0014
Subject:
Political Science, Democratization

Using nothing but the product of assembly size and district magnitude, a quantitatively predictive logical model allows us to estimate the average effective number of parties based on votes. Average ... More


The Mean Duration of Cabinets

Rein Taagepera

in Predicting Party Sizes: The Logic of Simple Electoral Systems

Published in print:
2007
Published Online:
September 2007
ISBN:
9780199287741
eISBN:
9780191713408
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199287741.003.0010
Subject:
Political Science, Democratization

Again the quantity to watch is the ‘seat product’. The inverse square law of cabinet durations says that the mean cabinet duration in a country is approximately forty-two years divided by the square ... More


The Cartel Party

Richard S. Katz and Peter Mair

in Democracy and the Cartelization of Political Parties

Published in print:
2018
Published Online:
July 2018
ISBN:
9780199586011
eISBN:
9780191866043
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780199586011.003.0006
Subject:
Political Science, Comparative Politics, Democratization

In terms of an analogy to economic markets, the political market for parties has nearly always been an oligopoly. In recent decades, that oligopoly has transformed into a cartel, in which the parties ... More


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