Re: RIF: st: chow test for more than 2 coef

[Richard Williams <Richard.A.Williams.5@ND.edu>]

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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Richard Williams, Notre Dame Dept of Sociology
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