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Abstract: Expert surveys have been subject to a number of criticisms concerning their ability to produce accurate estimates of party positions. Such criticisms have particular prima facie credibility in new post-Communist democracies of Central and Eastern Europe, where party development is regarded as weak. This paper compares data from two expert surveys independently conducted between 2002 and 2004. We find, contrary to expectations, that there is a remarkable overlap in positions assigned to parties. This suggests the usefulness of expert surveys even in the ‘most difficult’ case of post-Communist party systems. It also suggests that parties in these countries have developed effective means of communicating their positions on major issues. [Copyright &y& Elsevier]

Abstract: Our purpose in this article is to cross-validate expert and manifesto measures of party positioning on European integration. We compare these data with each other and with measures from a European election survey and an elite survey of parliamentarians. We find that expert surveys provide the most accurate data for party positioning on European integration. In part, the errors of expert evaluations and electoral manifestos are shared. Both have some difficulty measuring the positioning of small, extreme, parties. But we also detect and explain errors that are unique to each measurement instrument. [Copyright &y& Elsevier]