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


From   Wendy Regoeczi <[email protected]>
To   [email protected]
Subject   Re: st: RE: testing for significant differences between coefficients in different models
Date   Fri, 27 Apr 2007 12:50:58 -0400

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 <[email protected]>
�: [email protected]
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
> >[email protected]
> >
> >-----Original Message-----
> >From: [email protected]
> >[mailto:[email protected]] On Behalf
> Of Wendy Regoeczi >Sent: Friday, April 27, 2007 11:37 AM
> >To: [email protected]
> >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

Tel: ++41 (0)21 692-3438
Fax: ++41 (0)21 692-3305

http://www.hec.unil.ch/jantonakis
___________________________________

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