Integration and Differentiation in the European Union

Dirk Leuffen is Professor of International Politics at the Department of Politics and Public Administration, University of Konstanz, Germany. Berthold Rittberger is Professor of International Relations at the Geschwister-Scholl-Institute of Political Science, University of Munich, Germany. Frank Schimmelfennig is Professor of European Politics at ETH Zurich, Center for Comparative and International Studies, Switzerland.

• Introduction.- The European Union as a System of Differentiated Integration.- PART I: THEORY Intergovernmentalism.- Supranationalism.- Constructivism.- PART II: POLICIES The Single Market.- Economic and Monetary Union.- Security and Defence.- The Area of Freedom, Security, and Justice.- Conclusions: Integration and differentiation in the European Union.