Classical views of European integration have been shaken by the evolution of the past decade. It has become clear that the traditional division of tasks between the European Union and its Member States, and between the various European institutions no longer provides a valid description ofEuropean policy-making. As the EU has become a major actor in the field of risk regulation, new institutional and other actors such as scientific experts and transnational bureaucratic networks increasingly play a major role. This book considers the underlying forces that have brought about suchchange and critically analyzes the responses of the European institutions. Various contributions explore the constitutional and the administrative law dimensions of the developing European market governance, and they consider the changes which have occurred from the perspective of both legal andsocial theory.