The main tasks of central banks are to secure price and financial stability. These objectives can, in times of crises, conflict with one another, and the central bank may have to renounce one of them in order to secure the other. In a monetary union, this trade-off can be exacerbated by the...

Depending on the preferences of the central bank, countries in a monetary union tend to accumulate less debt. This reduces the need for fiscal criteria such as debt ceilings. In a monetary union with an independent central bank and a sufficiently large number of relatively small members,...