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st: RE: Working with groups


From   "Martin Weiss" <martin.weiss@uni-tuebingen.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Working with groups
Date   Thu, 10 Apr 2008 17:49:40 +0200

Your question is quite unclear: if you intend to look at two specific
regions, say

preserve
keep if region==1 | region==4
...
analysis
...
restore

if you want region 1 and 4.

Martin Weiss
_________________________________________________________________

Diplom-Kaufmann Martin Weiss
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-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of
mmolina@uniroma3.it
Sent: Thursday, April 10, 2008 5:38 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: Working with groups

Dear Statalist,

I am trying to model the effect of a treatment (x-variable) on an
outcome (y-variable). My database contains information of several regions,
how could I work only with two regions? Is there any specific command?
Thanks a lot.

Alejandra Molina


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