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st: growth in firm size


From   Cinzia Rienzo <C.Rienzo@rhul.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: growth in firm size
Date   Thu, 22 Jul 2010 16:27:28 +0100 (BST)

Dear statalisters,

I wonder whether you could give me any advice on the following:

I am working with firm level (panel) data and I am interested in firm 
size; I have three categories of firm size:
small if employees <=100
medium  if employees >100&<=1000
large  if employees >1000

Focusing on small firm at time t, what I would like to do is create a 
dummy variable =1 if  firm which was small at time t is medium or large 
at time  t+5. 

I found something about  firm size on the FAQ 
http://www.stata.com/statalist/archive/2009-05/msg00222.html 
but it is not really the way I would like to proceed.

Any ideas/suggestion?

Best

CInzia
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