number of industry classifications by 4 digit sic code
Posted: 23 August 2014 05:36 PM   [ Ignore ]
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Hello!

How do I find the number of industry classifications by 4 digit sic code for the year 2001.  I tried seg_naics.. But it only goes back to 2008.  This is one of the variables in the paper I am replicating! 

Thank you!!

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Posted: 23 August 2014 07:17 PM   [ Ignore ]   [ # 1 ]
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hi Samme,

In Fundamental Annual there is the field SICH, this is the ‘historic’ 4-digit SIC (at times missing, sometimes changing).

There is also the current SIC, which is in Compustat Company. This is never missing, but it is potentially inaccurate for firms that changed industry.

To be complete, there is also segment-level industry codes (in wrds_segmerged).

best regards,

Joost

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