The degree of comovement of economic activity across states or regions is an issue of utmost importance to policymakers. Asymmetric business cycles are often seen as an impediment to the formation of a common currency area. However, it has been argued that a common monetary policy in itself...

We examine real business cycle convergence for 41 euro area regions and 48 US states. Results obtained by a panel model with spatial correlation indicate that the relevance of common business cycle factors is rather stable over the past two decades in the euro area and the US. Ongoing business...