Abstract
Political parties are central to the process of democratization in east-central Europe. In contrast to the many studies that look at the instability of new parties and party systems, this article focuses on party organizational development. First, a hypothesis is put forward contending that parties in the region are likely to develop as formations with loose electoral constituencies, unimportant membership and a dominant role played by party leaders. Second, this hypothesis is tested on a sample of six parties from the Czech Republic. The analysis shows that certain variations in organizational structure exist, deriving from the distinction between old parties and newly established parties, the former deviating from the hypothesis to a greater extent than the latter.