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RE: st: interactions


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: interactions
Date   Wed, 31 Mar 2010 20:48:36 +0200

<>

So if Riyadh wanted domestic cars with very good repair record as the reference group:


*******
sysuse auto, clear
reg price weight ib1.rep78#ib0.foreign
*******


HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Maarten buis
Sent: Mittwoch, 31. März 2010 20:38
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: interactions

--- On Wed, 31/3/10, riyadh shamsan wrote:
> need to make interaction between 2
> cat variables each with different
> levels. (Ethnicity coded as 1,2,3 and 4) &
> (co-morbidity coded as 0,1,2,3)
> I need my reference group to be the group with ethnicity 1
> & co-morbidiy 0 and compare other combination with this
> group

The first line of your question got zapped by 
by the listserver (this sometimes happens on the
statalist), so I am infering some of the details
of your question.

The answer would something like:
regress y ib1.ethnicity##ib0.comob

See -help fvvarlist-.

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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