Why do countries find it so hard to get their budget deficits under control? Systematic patterns in the errors that official budget agencies make in their forecasts may play an important role. Although many observers have suggested that fiscal discipline can be restored via fiscal rules such as...

Eurozone members are supposedly constrained by the fiscal caps of the Stability and Growth Pact. Yet ever since the birth of the euro, members have postponed painful adjustment. Wishful thinking has played an important role in this failure. We find that governments’ forecasts are biased in the...