Differentiated Integration in the EU - From the inside looking out. CEPS Paperbacks. January 2014

Flexibility might be convenient when it comes to accommodating member states’ differing socio-economic and political interests in an expanding EU. Yet, opt-outs, enhanced cooperation and cooperation between member states outside the EU’s legal framework are calling into question the boundaries of this constitutional, institutional and legal differentiation in an EU that is founded on common principles, with a specific legal order and common institutions.

Differentiated Europe needs strong institutions. CHALLENGE EUROPE Issue 22 - Challenges and new beginnings: Priorities for the EU's new leadership, September 2014.

Differentiated Europe can be analysed in terms of the three meta-challenges outlined in this publication – stagnation, fragmentation and legitimacy. My argument is simple: stagnation or the prospect of it has been a catalyst for differentiation, fragmentation poses a risk of differentiation gone too far and legitimacy of differentiation is embedded on institutional cohesion and good results.

The European Union as a System of Differentiated Integration: Interdependence, Politicization and Differentiation. IHS Political Science Series No. 137, 10 July 2014

This paper conceptualizes the European Union (EU) as a system of differentiated integration characterized by both variation in levels of centralization (vertical differentiation) and variation in territorial extension (horizontal differentiation) across policy areas. Differentiation has been a concomitant of deepening and widening and has increased and consolidated as the EU’s powers, policy scope, and membership have grown. Turning to explanation, the paper attributes the pattern of differentiated integration in the EU to the interaction of interdependence and politicization. Differentiation among the member states (internal differentiation) results from supranational integration under conditions of high interdependence and politicization. By contrast, external differentiation (the selective policy integration of non-member states) occurs in highly interdependent but weakly politicized policy areas. These constellations are illustrated in case studies of differentiation in the internal market, monetary union, and defence.

A Differentiated, Balanced and Patient Approach? The EU’s Involvement with Georgia’s Secessionist Conflicts beyond the August 2008 War. EU Diplomacy Paper 06/2015.

The August war in 2008 between Russia and Georgia caught the world by surprise but nevertheless brought the European Union (EU) to the forefront of the international efforts to end the hostilities, and the EU became the leading international actor involved with the conflict resolution process. However, in the years following the armed conflict, the conflict resolution process lost pace, and the impact of the EU beyond the immediate aftermath of the August 2008 war has been put into question. By undertaking a qualitative case study, this paper aims to explore to what extent the EU has impacted on the conflict resolution process of Georgia’s secessionist conflicts in 2008-2015. It will argue that the EU’s policies have only to a limited extent impacted on this conflict resolution process, which can be related to the objectives, priorities and time perspectives of the EU’s conflict resolution policies. The EU’s efforts have significantly contributed to the objective of conflict prevention, but the profile of the EU in the field of international conflict management weakened its position in the area of conflict transformation, where the lack of progress in turn limited the EU’s impact in the areas of international conflict management and conflict settlement. The main conclusion put forward is that in order to have a true impact, the EU needs to undertake a differentiated, balanced and patient approach to conflict resolution.