A growing number of recent studies using plant-level data find a large degree of heterogeneity in the size, productivity, and growth patterns of manufacturing plants. In this paper, we explore the implications of this plant-level heterogeneity for macroeconomic dynamics and policy. In particular, we focus on the plant-level dynamics over the business cycle.
We first document the heterogeneity of U.S. manufacturing plants, using the Annual Survey of Manufactures (ASM) from the U.S. Census Bureau from 1972–1997. While previous studies on the entry and exit of producers document considerable fluctuations in entry and exit rates (e.g., Chaterjee and Cooper, 1993; Campbell, 1998), relatively little is known about how the characteristics of entering and exiting plants vary over the business cycle. We document the patterns of entry and exit over the business cycle in terms of rate, employment, and productivity. We find that entry rates differ significantly in booms and recessions. The differences in productivity and employment in booms and recessions are particularly larger for entering plants than the exiting plants. For example, the average employment of entering plants in recessions and their relative size (compared to incumbents) is larger than entering plants in booms. Moreover, the relative productivity of entering plants is also higher in recessions than in booms. Such differences are relatively small for plants exiting in booms or recessions.