Measuring Relatedness Using Commodity Flow Data in Input-Output Tables

Inter-industry relatedness coefficients

Inter-segment relatedness coefficients of COMPUSTAT firm: 1979-1997

SIC-IO codes conversion table

1. Inter-industry relatedness coefficients

The following files contain inter-industry relatedness coefficients as defined in Fan and Lang (Journal of Business, October 2000).  These coefficients are calculated from the 1982, 1987, and 1992 Use Table of the Benchmark Input-Output Account for the U.S. Economy, respectively.  Each of the files contains six columns.  Variables in these columns are defined as follows.   

Column 1: the first IO industry code

Column 2: the second IO industry code

Column 3: forward vertical relatedness coefficient

Column 4: backward vertical relatedness coefficient

Column 5: forward complementarity coefficient

Column 6: backward complementarity coefficient

Download :        [1982 coefficients]

Download :        [1987 coefficients]

Download :        [1992 coefficients]

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2. Inter-segment relatedness coefficients of COMPUSTAT firms: 1979-1997  

The following two files contain segment-level relatedness coefficients of U.S. firms reported by COMPUSTAT industry segment database. The first file is sorted by sales and the other one is sorted by assets.  The definitions of variables in these files are as follows.  

Column 1: COMPUSTAT six-digit CUSIP company number

Column 2: fiscal year

Column 3: number of industry segment(s)

Column 4: segment sales (assets) rank

Column 5: the SIC code of the primary segment of the company

Column 6: the SIC code of the segment

Column 7: the IO code of the primary segment of the company

Column 8: the IO code of the segment

Column 9: forward vertical relatedness coefficient

Column 10: backward vertical relatedness coefficient

Column 11: forward complementarity coefficient

Column 12: backward complementarity coefficient

Column 13: sales (assets) of the segment

Download :   [Inter-segment relatedness coefficients sorted by segment sales]

                    [Inter-segment relatedness coefficients sorted by segment assets]

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3. SIC-IO codes conversion table  

The table allows concordance between the Standard Industry Classification (SIC) codes and the industry codes (IO) used in the U.S. input-output tables.

Download :  [Conversion table]

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