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st: Consolidating data


From   "Kumar, M.V. Shyam" <KUMARM2@rpi.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Consolidating data
Date   Tue, 15 Jul 2008 00:04:07 -0400

Dear Statalisters:

I have a data set which looks as follows:

Company                             Product name                   Sales

Company A                         Product 1                             50

Company A                         Product 1                             150

Company A                         Product 2                             500

Company B                         Product 3                             200

Company B                         Product 4                             200

Company B                         Product 4                             400

And so on.....

I need to consolidate (i.e. add) the sales of products within each company and produce a data set which appears as follows. 

Company A                         Product 1                             200

Company A                         Product 2                             500

Company B                         Product 3                             200

Company B                         Product 4                             600

Some of you may be familiar with this problem. The data set as it appears on top is product segment data in Compustat reported according to FASB's SFAS 131. It is based on management's internal reporting standards. My purpose is to reconfigure the data so that it is based on distinguishable products and is along the lines of SFAS 13. I have made some attempts to do this using bysort but that does not work. Any help would be much appreciated and sincere apologies if this already been addressed earlier. Thank you. 

Shyam Kumar

Assitant Professor, Lally School of Managmenet

RPI. 


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