Measured productivity is strongly procyclical. Real business cycle theories suggest that actual fluctuations in productivity are the source of fluctuations in aggregate output. Keynesian theories maintain that fluctuations in aggregate output come from shocks to aggregate demand. Keynesian...

This paper asks whether the slow recovery of the US economy from the trough of the Great Recession was anticipated, and identifies some of the factors that contributed to surprises in the course of the recovery. It constructs a narrative using news reports and government announcements to...

What shocks account for the business cycle frequency and long run movements of output and prices? This paper addresses this question using the identifying assumption that only supply shocks, such as shocks to technology, oil prices, and labor supply affect output in the long run. Real and...

The experience of the Great Recession and its aftermath revealed that a lower bound on interestrates can be a serious obstacle for fighting recessions. However, the zero lower bound is not a law of nature;it is a policy choice. The central message of this paper is that with readily available...

The experience of the Great Recession and its aftermath revealed that a lower bound on interest rates can be a serious obstacle for fighting recessions. However, the zero lower bound is not a law of nature; it is a policy choice. The central message of this paper is that with readily available...