The empirical analysis of party organizations and party organizational change has long remained one of the least developed fields of study in comparative politics. Despite much discussion about the supposed "crisis of party" and the "decline of party" in Western democracies, we still know remarkably little about what goes on inside political parties. This book takes a look inside political parties, bringing together the findings of an international team of leading scholars. Building on a set of cross-national data on party organizations, the contributors set out to explain how parties organize, how they have changed and how they have adapted to the changing political and organizational circumstances in which they find themselves. The contributors are recognized authorities on the party systems of their countries, and have been involved in gathering data on party membership, party finance and the internal structure of power. They add to the analysis of these data a knowledge of the wider political patterns in their countries, and thus provide insight into the development of parties and party systems from the perspective of the party organizations themselves. Offering a systematic and comparable analysis of how parties organize in contemporary Europe and the United States, this volume should be useful reading for scholars and students of comparative politics and party politics.