The Greatest Flaw of the Optimum Currency Area Theory

How was a currency union integrating so many different sorts of national economies with complex distinct relationships with each other supposed to work? There are two variants of this kind of theory. The first variant was formalised in 1961, and it has to note a time in which there was still a great deal of confidence in governments conducting economic policy. And that's why I think that as an intellectual foundation for the Eurozone simply doesn't work out. But we should be wary of imputing our attribution sort of monocorsel influence on the process of European integration as a whole.