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Re: st: Working with groups


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Working with groups
Date   Thu, 10 Apr 2008 16:55:18 +0100 (BST)

--- mmolina@uniroma3.it wrote:
> 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? 

Say the variable containing information on the regions is called region
and you want to do your analysis for regions 1 and 2, then you type

regress y x if region == 1 | region == 2

For more see: -help if- .

hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

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


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