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Re: st: suest mlogit equation not found error


From   Fernando Rios Avila <f.rios.a@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: suest mlogit equation not found error
Date   Fri, 20 Jul 2012 12:45:36 -0400

Hi Natalia,
I haven't personally done a Chow test using an Mlogit model, however I
believe the right syntax is:
 mlogit Y x1 x2 x3 if period==0, base (0)
 est store model1
 mlogit Y x1 x2 x3 if period==1, base (0)
 est store model2

 suest model1 model2
 test [ model1_mean=mode2_mean]

Look at example 2 of the -suest- help file.
Fernando

On Fri, Jul 20, 2012 at 10:14 AM, natalia malancu
<natalia.malancu@gmail.com> wrote:
> Hi all,
>
> I estimate a mlogit model on two different periods of the same
> sample. Then I want to test if there is a structural change. My
> question is: how do I do Chow Test in stata in this case?
>
> At this point I tried using the -suest- command as follows:
>
> mlogit Y x1 x2 x3 if period==0, base (0)
> est store model1
> mlogit Y x1 x2 x3 if period==1, base (0)
> est store model2
>
> suest model1 model2
> test [ model1=mode2]
>
> but I keep receiving the following error:
>
> "equation model1 not found"
>
> I have also tried test[model1_Y=model2_Y] with similar limited success.
>
> Thanks for helping,
> Natalia
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