"This paper reviews the role of micro non-convexities in the study of business cycles. One important non-convexity arises because an individual can work only one workweek length in a given week. The implication of this non-convexity is that the aggregate intertemporal elasticity of labor supply...

The U.S. business cycle is characterized by the general increase and decrease of activity across all industries. When the pattern of industry comovement (documented here) is compared to corresponding properties of multi-sector growth models, a striking mismatch appears. Simply put, the basic...