Should a subset of member states of a federation be allowed to form a sub-union on some policy issue? When centralization is not politically feasible, allowing an enhanced cooperation agreement among a subset of countries permits the latter to gain benefits which would otherwise be lost....

We use a quantitative model to study the implications of European integration for welfare and migration flows across 1,318 regions. The model suggests that an increase of trade barriers to the level of 1957 reduces welfare by about 1-2 percent on average, depending on the presumed trade...

Under what conditions can the European Neighbourhood Policy achieve one of its main objectives: to resolve conflicts in the European Union's neighbourhood? In the spirit of Montesquieu and Monnet, the basic hypothesis of the EU is that closer economic integration encourages governments to take...

This paper addresses two main questions: (a) Has European integration hindered the implementation of labour, financial and product market structural reforms? (b) Do the effects of these reforms vary more across sectors than across countries? Using more granular reform measures, longer time...

We explore the role of the transfers that UK regions received from the European structural and cohesion funds, as well as other economic and social factors, in determining the support for the Remain vote in the Brexit referendum. We find that past European transfers have played virtually no role...

A major characteristic of the European Union is its transitional or evolving nature, in particular with regard to the assignment of powers between the two main levels of government. More precisely, under current constitutional arrangements, this evolving nature takes the form of an integration...