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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 20:58:52 +0200

<>
What`s your -version- of Stata? If other than 11, you are asked to say so!


HTH
Martin


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of riyadh shamsan
Sent: Mittwoch, 31. März 2010 20:57
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: interactions

i didn't work!

can't find fvvarlist

On Wed, Mar 31, 2010 at 7:48 PM, Martin Weiss <martin.weiss1@gmx.de> wrote:
>
> <>
>
> 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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