This book explores one of the central challenges facing the EU today - how to reconcile enlargement with the pursuit of a stronger and more effective European Union. While the relationship between widening and deepening has been recognized for years as one of the big questions in the field of European integration, existing theoretical and empirical analyses of this relationship suffer from a variety of shortcomings. This book brings together a group of EU scholars who significantly advance our understanding of the relationship between widening and deepening. The contributors challenge a...