This article studies the impact on aggregate economic activity of increases in defense purchases which are unrelated to other developments in the economy. The authors use empirical evidence to evaluate the predictions of several prominent models.

Evidence on the cost of business equipment investment supports a new way of understanding growth and business cycles. The equipment price has been falling for most of the last 40 years and it tends to fall more the faster economy is growing. This suggests that technological change embodied in...

The authors describe how evidence on aggregate job flows challenges standard business cycle theory and discuss recent developments in business cycle theory aimed at accounting for the evidence.

This article discusses the empirical performance of a widely used model of nominal rigidities: the Calvo model of sticky good prices. The authors argue that there is overwhelming evidence against this model. But this evidence is generated under three key assumptions: one, there is no lag between...