Sure, that is what I want to test: done with the command testparm...I can now proceed with separate models
thanks, thanks, thanks
At 09:36 AM 3/3/2008, Mussida Chiara wrote:
>As i said in my message, I wanted to know if by imposing equality
>between coef I can get test results equivalent to the ones obtained
>with a chow test (for 2 categories). Probably the name is no more
>chow, but it has the same meaning of this test. the only difference
>is related to the no of cateories employed.
>Anyway thanks, I'm going to add this question:
>is the tes result enough to allow me to run separate reg (one for
>each category)??
>
>thanks
Ok I am confused. When you say
b1=b2=b3=b4=b5
That makes me think that you want to test the equality of the
coefficients for variables x1, x2, x3, etc. Do you mean instead that
you want to test the equality of coefficients across populations for
population 1, population 2, etc? If so, check out the FAQs at
http://www.stata.com/support/faqs/stat/chow.html
http://www.stata.com/support/faqs/stat/chow3.html
http://www.stata.com/support/faqs/stat/awreg.html
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