R. Leonardi 
Convergence, Cohesion and Integration in the European Union [PDF ebook] 

Convergence, Cohesion and Integration in the European Union tackles the fundamental theoretical and empirical issues underlying the process of European integration. Two basic arguments underlie the book. The first is that economic convergence in postwar Europe has reduced the disparities between regions and that this has been an important accelerator of the drive for integration. The second is that, in contrast to the situation before 1985 when nation states dominated the move to integration, grass roots pressure has been the dominant force since the Single European Act and the preparation for the single market.