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Re: st: Deleting Only Particular Observations


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Deleting Only Particular Observations
Date   Wed, 1 Jul 2009 20:41:26 +0000 (GMT)

--- On Wed, 1/7/09, Christian Weiß wrote:
> Variable size contains the marketcap of about 2000 firms
> from 11 countries (grouping var country).
> 
> I would like to keep only the 100 biggest firms (by
> marketcap) from each country, and delete the residual
> observations.

gen negsize = -size
bys country (negsize) : keep if _n < 101
drop negsize

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://home.fsw.vu.nl/m.buis/
-----------------------------------------




      

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