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Re: st: Comparing coefficients from two ivregress models


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Comparing coefficients from two ivregress models
Date   Thu, 8 Sep 2011 10:12:31 +0200

On Thu, Sep 8, 2011 at 9:56 AM, YUNHEE CHANG wrote:
> I am estimating two differently-specified IV regressions and trying to compare coefficients between the two models. I tried:
>
> ivregress 2sls y x1 x2 (x1=z)
> est store reg1
>
> ivregress 2sls y x1 x2 x3 (x1=z)
> est store reg2
>
> test [reg1]_b[x1]=[reg2]_b[x1]
>
> Then I get "equation [reg1] not found" error. What am I doing wrong?

That might have worked after you combined both models with -suest-,
but -ivregress- cannot be used together with -suest-. So what you want
cannot be done.

Sorry,
Maarten

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


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