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Re: st: R: Hausman test
From
Carmen Blanco <[email protected]>
To
[email protected]
Subject
Re: st: R: Hausman test
Date
Mon, 28 Jan 2013 15:39:24 +0100
Thanks Carlo
2013/1/28 Carlo Lazzaro <[email protected]>:
> Carmen may want to take a look at:
>
> [R] hausman in r.pdf file (Base Reference manual of Stata 12.1). Page 713
> covers the topic Carmen is interested in.
>
> Best regards,
> Carlo
> -----Messaggio originale-----
> Da: [email protected]
> [mailto:[email protected]] Per conto di Carmen Blanco
> Inviato: lunedì 28 gennaio 2013 11:49
> A: [email protected]
> Oggetto: st: Hausman test
>
> Dear statalist,
>
> I have some problem with Hausman test. When I compare between random effects
> and fixed effects with Hausman test, Stata reports me this:
>
> chi2(4) = (b-B)'[(V_b-V_B)^(-1)](b-B)
> = -45.27 chi2<0 ==> model fitted on these
> data fails to meet the asymptotic
> assumptions of the Hausman test;
> see suest for a generalized test
>
> Could someone tell me, please, how to solve this problem in order to know if
> my model is random or fixed effects?
>
> Thanks
>
> C.B.
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