Concording U.S. Harmonized System Categories Over Time
20 Pages Posted: 7 Apr 2009 Last revised: 18 Jul 2010
Date Written: April 2009
This paper: outlines an algorithm for concording U.S. ten-digit Harmonized System export and import codes over time; describes the concordances we construct for 1989 to 2004; and provides Stata code that can be used to construct similar concordances for arbitrary beginning and ending years from 1989 to 2007.
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