Evaluating estimates of materials offshoring from US manufacturing
When materials offshoring is measured by estimating imported intermediate inputs, a common assumption used is that an industry’s imports of each input, relative to its total demand, is the same as the economy-wide imports relative to total demand: this is the so-called “import comparability” or “proportionality” assumption. A report to the National Research Council identified this assumption as being a significant limitation of current data collection and analysis. In this note we move beyond this assumption to obtain a direct measure of imported materials by industry for the United States in 1997. At the 3-digit I–O industry level, there is a correlation of 0.68 between the offshoring shares made with and without the proportionality assumption, and a higher correlation of 0.87 when the shares are value weighted. While most value-weighted industries have differences below 50 percentage points in the two estimates, there are a significant number of cases that differ by 10 percentage points or more.
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- Feenstra, Robert C. & Jensen, J. Bradford, 2012.
"Evaluating estimates of materials offshoring from US manufacturing,"
Elsevier, vol. 117(1), pages 170-173.
- Robert C. Feenstra & J. Bradford Jensen, 2012. "Evaluating Estimates of Materials Offshoring from U.S. Manufacturing," NBER Working Papers 17916, National Bureau of Economic Research, Inc.
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- Susan N. Houseman & Christopher Kurz & Paul Lengermann & Benjamin Mandel, .
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snh20112, W.E. Upjohn Institute for Employment Research.
- Robert C. Feenstra, 1996. "U.S. Imports, 1972-1994: Data and Concordances," NBER Working Papers 5515, National Bureau of Economic Research, Inc.
- Andrew B. Bernard & J. Bradford Jensen & Peter K. Schott, 2005.
"Importers, Exporters, and Multinationals: A Portrait of Firms in the U.S. that Trade Goods,"
NBER Working Papers
11404, National Bureau of Economic Research, Inc.
- Andrew B. Bernard & J. Bradford Jensen & Peter K. Schott, 2009. "Importers, Exporters and Multinationals: A Portrait of Firms in the U.S. that Trade Goods," NBER Chapters, in: Producer Dynamics: New Evidence from Micro Data, pages 513-552 National Bureau of Economic Research, Inc.
- J. Bradford Jensen & Andrew Bernard & Peter Schott, 2005. "Importers, Exporters, and Multinationals: A Portrait of Firms in the U.S. that Trade Goods," Working Papers 05-20, Center for Economic Studies, U.S. Census Bureau.
- Andrew B. Bernard & J. Bradford Jensen & Peter K. Schott, 2005. "Importers, Exporters, and Multinationals: A Portrait of Firms in the U.S. that Trade Goods," Working Paper Series WP05-10, Peterson Institute for International Economics.
- Robert C. Feenstra & John Romalis & Peter K. Schott, 2002. "U.S. Imports, Exports, and Tariff Data, 1989-2001," NBER Working Papers 9387, National Bureau of Economic Research, Inc.
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