ABSTRACT
The study of the European Union (EU) seems doomed to fall between two stools. As an intergovernmental organization, the EU originally belonged to the field of international relations. However, more than half of all legislation in domestic parliaments now stems from EU politics in one way or another, making the EU a central part of domestic politics best studied in comparative politics. Making the choice to deepen European integration is often grounded in domestic political economy, but at the same time deeper integration reshapes that domestic political economy, thereby transforming domestic politics in Europe.
