English title: Measuring Parties’ Ideological Positions with Manifesto Data - A Critical Evaluation of the Competing Methods

Author(s): Elias Dinas - Kostas Gemenis -

Language: English

Type: Journal article

Year: 2010


Within the rapidly growing literature on positioning political parties along policy dimensions, the rich data series collected by the Comparative Manifestos Project (CMP) has been widely considered as the most systematic and objective source of information. For estimating parties’ positions on the Left—Right dimension alone, several different methods have been proposed which make use of the CMP data. However, unless a new method is proposed, there will seldom be any attempt to check the robustness of the findings across different measurement strategies. In this article, we focus on the parties in Greece, which have been notoriously incorrectly positioned by the ‘standard’ method proposed by the CMP. We contrast the ‘standard’ method with various proposed alternatives and show that the latter outperform the former both in terms of face and convergent validity and in terms of reliability. In addition, we show that this cross-checking is essential, since different methods often lead to diametrically opposite results.

Volume: 16

Issue: 4

From page no: 427

To page no: 450

Refereed: Yes

DOI: 10.1177/1354068809343107

Journal: Party Politics

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