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

The European Union as a System of Differentiated Integration: Interdependence, Politicization and Differentiation

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

Differentiated integration in the European Union: Institutional effects, public opinion, and alternative flexibility arrangements

Research on differentiated integration (DI) in the European Union (EU) has focused on the causes, conditions, and patterns of differentiation in European integration. By contrast, we know less about its effects on institutional outcomes and public support; moreover, alternatives to de jure DI in providing flexibility are still rarely accounted for. This introduction to the special issue takes stock of, and discusses omissions, in the current literature on DI. We propose an analytical framework, centering on efficiency and legitimacy, to study the effects of different types of DI. We use this framework to motivate the choice and assess the contributions of the articles selected for this special issue

Mapping public support for the varieties of differentiated integration

This article maps and investigates public support for different types of differentiated integration (DI) in the European Union. We examine citizens' preferences for DI using novel survey data from eight EU member states. The data reveals substantive differences in support for different types of DI. Factor analyses reveal two dimensions that seem to structure citizens' evaluations of DI. The first dimension relates to the effect of DI on the European integration project, the second concerns the safeguarding of national autonomy. Citizens' attitudes on this second dimension vary substantively across countries. General EU support is the most important correlate of DI support, correlating positively with the first and negatively with the second dimension. Our results underline that while citizens generally care about the fairness of DI, balancing out their different concerns can be a challenging political task

Gridlock after enlargement? An analysis of legislative output in the European Union∗

In this paper we analyze the impact of European Union (EU) enlargement on EU policymaking. Most theories of social choice argue that group‐size negatively affects the efficiency of decision‐making. Veto player theory, for instance, claims that adding veto players increases policy stability. Similarly, a‐priori voting power theory expects legislative output to decline with shrinking passage probabilities. Building on these theories, we derive a set of hypotheses on group size and decision‐making. We test these theories by estimating count models on a dataset of EU legislative output from 1976 to 2009. While we find some evidence for a reduction of the number of legislative acts passed, this especially holds for the production of directives and regulations, the effects are smaller than expected by our theories. We also present an analysis of legislative output in the Common Fisheries Policy and the Common Agricultural Policy. For fisheries we can show that group heterogeneity in addition to group‐size has an impact on policy production