Re: st: RE: testing for significant differences between coefficients in different models

[Wendy Regoeczi <w.regoeczi@csuohio.edu>]

Thanks for the clarification. That works. But 
apparently Stata won't conduct the test if the 
models are different types. Using the lrtest 
command after the second model, the tests are not 
conducted. Instead, I get an error message 
reading: "test involves different estimators: logistic vs. cox"

At 12:42 PM 4/27/2007, you wrote:

> The command is:
>
> est store
>
> Best,
> J.
>
> ----- Original Message -----
> Exp�diteur: Wendy Regoeczi <w.regoeczi@csuohio.edu>
> �: statalist@hsphsun2.harvard.edu
> Sujet: Re: st: RE: testing for significant differences
> between coefficients in  different models
> Date: Fri, 27 Apr 2007 12:40:30 -0400
>
> > Thanks for the suggestion. I just tried it, but I get an
> > error  message reading "unrecognized command: store"
> > I tried typing the command after I ran the model, and also
> > including  at the end of the model statement before
> > running the model, but both  ways result in error
> > messages. Am I doing something wrong?
> >
> > At 12:11 PM 4/27/2007, you wrote:
> > >Use the likelihood ratio test.
> > >
> > >After the first model write:
> > >
> > >Store estimates A
> > >
> > >After the second model write:
> > >
> > >Store estimates B
> > >Lrtest A
> > >
> > >Cynthia Fontanella
> > >Fontanella.4@osu.edu
> > >
> > >-----Original Message-----
> > >From: owner-statalist@hsphsun2.harvard.edu
> > >[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf
> > Of Wendy Regoeczi >Sent: Friday, April 27, 2007 11:37 AM
> > >To: statalist@hsphsun2.harvard.edu
> > >Subject: st: testing for significant differences between
> > coefficients in >different models
> > >
> > >Hello all,
> > >I couldn't find an answer to this question in the
> > archives. I am >analyzing two models using the same set of
> > independent variables, one >is a logistic regression model
> > and the other is a Cox proportional >hazards model. It has
> > been suggested to me that I should do some >post-hoc tests
> > of the differences between the coefficients in the two
> > >models. Is there a way to do this in Stata, given that
> > two different >types of models are being estimated and the
> > variable names are >identical in both models?
> > >
> > >Any help would be greatly appreciated!
> > >Sincerely,
> > >Wendy Regoeczi
> > >
> > >*
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> ___________________________________
>
> Prof. John Antonakis
> Faculty of Business and Economics
> University of Lausanne
> Internef #527
> CH-1015 Lausanne-Dorigny
> Switzerland
>
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