We review and interpret recent work on inventories, emphasizing empirical and business cycle aspects. We begin by documenting two empirical regularities about inventories. The first is the well-known one that inventories move procyclically. The second is that inventory movements are quite...

Firms have very different inventory levels. How much of this heterogeneity is due to differences among firms, versus among industries? Using all observations in COMPUSTAT for 1950 through 2004, we find that both industry and firm effects are significant. Further, firm effects are as strong as,...