RE: st: RE: Fwd: zip zinb : testparm or loglikelihood ?

[Johanna LEPEULE <lepeule@vet-nantes.fr>]

Thank you Marteen for your help.
I looked at the document that you indicated to me and I used it to build my
model.

Johanna Lepeule

Le 14:35 18/06/2007, vous avez �crit:
> --- Johanna LEPEULE wrote:
> > I forgot to specify that I also use a random effect.
> >
> > Thus :
> > xi : zip nbaoaj i.breed agerx6 i.mother_age, inflate(i.breed agerx6)
> > cluster(farm) robust
> >
> > When I test the addition of the variable "i.mother_age", I do not have the
> > same result with "testparm" or with "Loglikelihood test". It seems that the
> > loglikelihood test does not take into account the random effect.
>
> This is crucial information. You can find the answer at:
> http://www.stata.com/support/faqs/stat/lrtest.html
>
> Hope this helps,
> Maarten
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting address:
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>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
>
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Johanna Lepeule
UMR 708 Gestion de la Sant� Animale
Ecole V�t�rinaire de Nantes / INRA
BP 40706, 44307 Nantes Cedex 03
T�l�phone: +33 (0) 240 687 821, Fax: +33 (0) 240 687 768
courriel : lepeule@vet-nantes.fr


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