"This collection looks at transnational infrastructures, from the first ceremonial train of the European Coal and Steel Community to the new border signs replacing checkpoints along motorways, and how such infrastructural links are part of the long history of European unification"--

There is a substantial heterogeneity in productivity when comparing individual firms. However, even when heterogeneity is found, some questions still remain unaddressed. For instance, when focusing on EU nothing is known about the importance of firms' heterogeneity compared with that of...