Output fluctuations at the plant level

This paper studies weekly output fluctuations from 1972 to 1983 at fifty final assembly plants in the U.S. automobile industry. The study makes use of a new data set that contains detailed information on plant operations. The main findings of the paper are: (1) Even at the simplest fabrication and assembly plant, there are a variety of margins on which production quantities are adjusted; (2) The production adjustment margins appear to have very different dynamic characteristics; and (3) The analysis of plant level data can lead to conclusions that are dramatically different from those reached using aggregated data, even though the data are driven by industry-wide shocks.