The search for solutions to the euro crisis is based on a partial diagnosis that overemphasises the lack of enforcement of existing fiscal rules. Europe's leaders should rather address the euro area's inherent weaknesses revealed by the crisis. At the core of euro-area vulnerability is an...

Extensive prior research on the economics of European monetary union highlighted some potential risks (the known unknowns) but overlooked others (the unknown unknowns). Asymmetries among participating countries, the potentially destabilising character of a one-size-fits all monetary policy, the...