There is a widely held perception that improved supply chain practices and new technologies have led to declines in the inventory-sales ratio. Our empirical analyses of 87 inventory-sales ratios in 45 manufacturing, wholesale distribution, and retail trade industries casts doubt on assumptions of widespread declines in these ratios. We find that less than half of the ratios showed statistically significant declines during the 12 year period from January 1992 through December 2003. Information technology may indeed have improved inventory management, but this improvement is not reflected in inventory-sales ratio data for many U.S. industries. Our detailed case study of the pharmaceutical supply chain also offers additional insights by showing how relevant technological investments led to an extended period in which inventory-to-sales ratios increased.
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Paper provided by Center for Economic Studies, U.S. Census Bureau in its series Working Papers with number
04-18.
References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
Valerie A. Ramey & Kenneth D. West, 1997.
"Inventories,"
NBER Working Papers
6315, National Bureau of Economic Research, Inc.
[Downloadable!] (restricted)
Other versions:
Ramey, Valerie A. & West, Kenneth D., 1999.
"Inventories,"
Handbook of Macroeconomics,
in: J. B. Taylor & M. Woodford (ed.), Handbook of Macroeconomics, edition 1, volume 1, chapter 13, pages 863-923
Elsevier.
[Downloadable!] (restricted)
Jonathan McCarthy & Egon Zakrajsek, 1998.
"Trade inventories,"
Staff Reports
53, Federal Reserve Bank of New York.
[Downloadable!]