Re: st: formula of aic in stata... to continue

[Eric Cahuzac <cahuzac@toulouse.inra.fr>]

Yes I am agree with Nicola, but... -fitstat- display 
AIC=(-2*ln(L)+2*p)/n and AIC*n = AIC be careful!


Nicola Orsini a �crit :


> See Stata 9 manual [R] -estat- pp.328-335
>
> AIC = -2*ln(L)+2*p
>
> where ln(L) is the log-likelihood of the model and p is the number of 
> parameters.
>
> Reference
>
> Akaike, H. Information theory and an extension of the maximum likelihood
>    principle. In B.N.Petrov and F.Csaki (eds), Second International
>    Symposium on Information Theory, Academiai Kiado, Budapest, 267--281
>    (1973).
>
> Nicola
>
> I.A.C. van de Snepscheut wrote:
>
>
> > Hello
> >
> > Does anyone know what the formula of the aic in stata 9 is?
> >
> > Inez
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/support/faqs/res/findit.html
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
>
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/

--
______________________________

Eric Cahuzac
Institut National de la Recherche Agronomique (INRA)
Station d'Economie et Sociologie Rurale (ESR)
Chemin de Borde-Rouge - Auzeville
BP 52627, 31326 CASTANET-TOLOSAN CEDEX
Tel. 05.61.28.53.41 (direct)
    05.61.28.53.49 (secr�tariat)
Fax. 05.61.28.53.72
e-mail  cahuzac@toulouse.inra.fr
http://www.toulouse.inra.fr/esr

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/