It is widely assumed that a common currency makes it desirable to have also a common fiscal policy. However, if fiscal policy is a source of shocks, independent national fiscal policies are generally preferable because they allow for risk diversification.

It is widely assumed that a common currency makes it desirable to have also a common fiscal policy. However, if fiscal policy is a source of shocks, independent national fiscal policies are generally preferable because they allow for risk diversification. -- Currency union ; fiscal policy...