The special issue 'Differentiated Integration in the European Union' of Journal of European Public Policy (JEPP) is edited by Christopher Lord and Benjamin Leruth, former guest researcher at ARENA. In the introductory article they argue that the study of differentiation needs to move up the research agenda of European integration.
List of contributions by ARENA's staff
Differentiated integration in the European Union: a concept, a process, a system or a theory?
Benjamin Leruth and Christopher Lord
Utopia or dystopia? Towards a normative analysis of differentiated integration
Christopher Lord
Democracy and differentiation in Europe
John Erik Fossum
Operationalizing national preferences on Europe and differentiated integration
Benjamin Leruth