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st: Drop subjects from a panel


From   Ayman Farahat <ayman.farahat@yahoo.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Drop subjects from a panel
Date   Wed, 8 Feb 2012 12:36:30 -0800 (PST)

Hello ; 

 I have a panel data. I would like to remove all subjects that had a certain co-variate at a specific time. 

For example, drop all subjects that had a covariate==0 for time==2.
Any help greatly appreciated. 

Thanks
Ayman


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