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st: RE: how to run nbreg with "if" command?


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: how to run nbreg with "if" command?
Date   Mon, 14 Mar 2005 20:40:09 -0000

I can't reproduce this at all. Looks 
perfectly legal. 

Nick 
n.j.cox@durham.ac.uk 

sarah smith
 
> I am trying to run nbreg as below;
> 
> nbreg y x1 x2 if x3==1
> 
> where x3 is a dummy variable and I want to do the regression only
> using the observations where x3 is equal to 1. However I receive an
> error message saying that "if is not allowed". Could you suggest a way
> to do this?
> 

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