Catalog of Holdings

Study Report

Study Number: ZA-033-001-1-1-United States-NBER-1989

Subject Area: Refernce Materials in Machine Readable Form

Bibliographic Citation: Concording U.S. harmonized system categories over time, 1989 to 2007: a NBER working paper.  [machine-readable data file] / Pierce, Justin R.  [principal investigator(s)] / Cambridge, Massachusetts: National Bureau of Economic Research  [distributor].

Originating Archive Number: CES-WP-09-11

Date Accessioned: 10/16/2009

Number of Files Received: 0

Comments: To obtain a copy of this NBER working paper, visit this website

Access Status: Unrestricted access

Documentation: This paper is in PDF format.

Abstract: This NBER working paper outlines an algorithm for concording ten-digit U.S. Harmonized System (HS) product codes over time. It describes how this algorithm can be used to construct an export- or import-code concordance for any arbitrary beginning and ending years from 1989 to 2007. It also contains the Stata code and the input files used to generate concordances.

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