Concording U.S. Harmonized System categories over time
AbstractMonitoring changes to product classification systems is an important component of a wide range of empirical research. In this paper we develop an algorithm for concording periodic revisions to the ten-digit Harmonized System (HS) codes used by U.S. statistical agencies to categorize international trade since 1989. We use this algorithm to construct the first comprehensive concordance of HS codes over time, and show how this concordance can be extended to incorporate future revisions. We then characterize the extent of HS-code changes since 1989 and discuss how controlling for these revisions is critical for understanding the growth of U.S. trade. Lastly, we highlight the general applicability of the algorithm to other national and international product classification systems.
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Bibliographic InfoPaper provided by Board of Governors of the Federal Reserve System (U.S.) in its series Finance and Economics Discussion Series with number 2012-16.
Date of creation: 2012
Date of revision:
Other versions of this item:
- Justin R. Pierce & Peter K. Schott, 2009. "Concording U.S. Harmonized System Categories Over Time," NBER Working Papers 14837, National Bureau of Economic Research, Inc.
- Justin Pierce & Peter Schott, 2009. "Concording U.S. Harmonized System Categories Over Time," Working Papers 09-11, Center for Economic Studies, U.S. Census Bureau.
- F1 - International Economics - - Trade
This paper has been announced in the following NEP Reports:
- NEP-ALL-2012-05-15 (All new papers)
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- Pinelopi Goldberg & Amit Khandelwal & Nina Pavcnik & Petia Topalova, 2009.
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09-38r, Center for Economic Studies, U.S. Census Bureau, revised Jul 2011.
- Pierce, Justin R., 2011. "Plant-level responses to antidumping duties: Evidence from U.S. manufacturers," Journal of International Economics, Elsevier, vol. 85(2), pages 222-233.
- Justin R. Pierce, 2011. "Plant-level responses to antidumping duties: evidence from U.S. manufacturers," Finance and Economics Discussion Series 2011-40, Board of Governors of the Federal Reserve System (U.S.).
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