When in 1992 the decision to provide Europe with the single currency was adopted, voices were raised claiming that it may be difficult to have a monetary union without a political union. This is considered to be particularly the case on occasion of “asymmetric shocks” which may hit weaker “peripheral economies” in a monetary union, but not stronger “core ones”. The Eurozone, even at its infancy, has never constituted an Optimal Currency Area, but at a time of relative economic growth the Stability and Growth Pact (SGP) was by most considered as a sufficient tool to secure the sustainability of the single currency. However, the economic crisis of the early 2000s and the current “Euro crisis” have proved the opposite. …