Marise Cremona is Professor of European Law and Head of the Law Department of the European University Institute, Florence. Jörg Monar is Director of Political and Administrative Studies at the College of Europe (Bruges) and holds the Chair of Contemporary European Studies at the Sussex European Institute (University of Sussex, Brighton). Sara Poli is Lecturer in International Law at the Universita degli Studi di Roma ‘Tor Vergata', Rome.