In terms of U.S. output contractions, the so-called Great Recession was not much more severe than the recessions in 1973-75 and 1981-82. Yet recovery from the latest recession has started out much more slowly. For example, real GDP expanded by 7.7% in 1983 after unemployment peaked at 10.8% in December 1982, whereas GDP grew at an unimpressive annual rate of 2.2% in the third quarter of 2009. Although the fourth quarter is likely to show better numbers—probably much better—there are no signs of an explosive take off from the recession.

We...