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Measuring and Comparing Party Ideology and Heterogeneity

Carroll, Royce and Kubo, Hiroki (2019) 'Measuring and Comparing Party Ideology and Heterogeneity.' Party Politics, 25 (2). 245 - 256. ISSN 1354-0688

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Estimates of party ideological positions in Western Democracies yield useful party-level information, but lack the ability to provide insight into intraparty politics. In this paper, we generate comparable measures of latent individual policy positions from elite survey data which enable analysis of elite-level party ideology and heterogeneity. This approach has advantages over both expert surveys and approaches based on behavioral data, such as roll call voting and is directly relevant to the study of party cohesion. We generate a measure of elite positions for several European countries using a common space scaling approach and demonstrate its validity as a measure of party ideology. We then apply these data to determine the sources of party heterogeneity, focusing on the role of intraparty competition in electoral systems, nomination rules, and party goals. We find that policy-seeking parties and centralized party nomination rules reduce party heterogeneity. While intraparty competition has no effect, the presence of these electoral rules conditions the effect of district magnitude.

Item Type: Article
Uncontrolled Keywords: political parties, party ideology, elite survey, political elites, intra-party politics, Western Europe
Subjects: J Political Science > JA Political science (General)
J Political Science > JF Political institutions (General)
J Political Science > JN Political institutions (Europe)
Divisions: Faculty of Social Sciences > Government, Department of
Depositing User: Royce Carroll
Date Deposited: 24 Apr 2017 14:15
Last Modified: 21 Jan 2020 13:15

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