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st: Different numbers of observations in sureg


From   Marcello Pagano <pagano@hsph.harvard.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: Different numbers of observations in sureg
Date   Mon, 14 May 2007 09:16:36 -0400

Alemu Mekonnen wrote:

I would like to use different number of observations in the different equations when using the seemingly unrelated regression command in stata (i.e., sureg). For example, if there are two equations, I wanted to use 600 observations for equation 1 and 900 observations for equation 2. My question is how do I limit the number of observations to do this. I was not able to use the IF command but this applies to all the equations in the system.
Kind regards,
Alemu Mekonnen


Alemu Mekonnen, Ph.D.
Department of Economics
Addis Ababa University
P.O. Box 150167
Addis Ababa
Ethiopia
Phone: +251(0)911 157055(Mobile)

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