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Re: st: Re: comparing OR (coefficients) across equations


From   Ricardo Ovaldia <ovaldia@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: comparing OR (coefficients) across equations
Date   Tue, 2 Nov 2004 05:51:42 -0800 (PST)

Great. Thank you.

Ricardo.

--- "R.E. De Hoyos" <redeho@hotmail.com> wrote:

> Ricardo,
> 
> I guess you have three groups in your sample:
> cancerA, cancerB and other. 
> You can fit an -mlogit- with these three categories
> to see if the 
> independent variables have a different effect upon
> the likelihood of showing 
> a particular disease.
> 
> Once you have the coefficients into a single
> -mlogit- it is relatively easy 
> to test Ho. of equality in parameters.
> 
> I hope this helps,
> 
> Rafa
> 
> 
> ----- Original Message ----- 
> From: "Ricardo Ovaldia" <ovaldia@yahoo.com>
> To: <statalist@hsphsun2.harvard.edu>
> Sent: Monday, November 01, 2004 8:48 PM
> Subject: Re: st: Re: comparing OR (coefficients)
> across equations
> 
> 
> > --- "R.E. De Hoyos" <redeho@hotmail.com> wrote:
> >
> >> Ricardo,
> >>
> >> According to the Statalist archives you have
> asked
> >> this question before
> >> (30/Aug/04) and received several informed
> replies.
> >>
> >>
> >
>
http://www.stata.com/statalist/archive/2004-08/msg00870.html
> >>
> >> Did I miss something?
> >
> > The difference is that in that situation I wanted
> to
> > compare coefficients computed from the same
> model(same
> > outcome & IV)applied to two different populations.
> For
> > my current question I have the same independent
> > variables but the outcome variables is different.
> Two
> > different cancers, same control group.
> >
> > I thing this is different, but I am not sure.
> Also, I
> > was wondering if -mhodds- would work in this case.
> > Note that I have both continuous and discrete
> > covariates.
> >
> > Thanks,
> > Ricardo.
> >
> >
> >
> >
> >
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=====
Ricardo Ovaldia, MS
Statistician 
Oklahoma City, OK


		
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