Gaps in competitiveness, rooted in economic as well as in political factors, characterise postwar European economic history. The eurozone experience showed the emergence of large current account imbalances. The peculiar mixture of financial markets integration and national cycles in wages and...

Old OCA theory recommends to unite homogenous countries so that their macroeconomic interrelations do not pose severe stabilisation problems. New OCA theory rightly criticizes the 1960s flavour of the old approach and believes in the endogenous emergence of an OCA if countries use the facilities...