Re: st: probit vs. logit

["Michael N. Mitchell" <Michael.Norman.Mitchell@gmail.com>]

Dear Everyone responding on this thread...

  These are all great ideas about "logit" and "probit"... I think this thread has 
gravitated lots of thoughts and perspectives that I see discussed "on the street" but not 
written about. It is like statistical water cooler conversation.

Thanks!

Michael N. Mitchell
Data Management Using Stata      - http://www.stata.com/bookstore/dmus.html
A Visual Guide to Stata Graphics - http://www.stata.com/bookstore/vgsg.html
Stata tidbit of the week         - http://www.MichaelNormanMitchell.com



On 2010-05-25 5.00 AM, Maarten buis wrote:
> --- On Tue, 25/5/10, Michael N. Mitchell wrote:
> > I agree with Martin, that<snip>
> http://www.stata.com/statalist/archive/2010-02/msg00840.html
>
> > If someone gets picky with you and really wants to see a
> > comparison of the model fit of the two models, I think you
> > could use -estimates store- and -estimates stats- (as shown
> > below) to compare the fit of the models using the AIC and/or
> > BIC (where a smaller value means better fit). As in the
> > example below, the two values are nearly identical, and I
> > think we all expect that this would generally be the case.
>
> Michael shows that in his example he finds a BIC difference of
> .02036. To give it a bit of perspective: Adrian Raftery (1995)
> propsed the following categorization of BIC differences:
>
> 0-2  : Weak evidence
> 2-6  : Positive evidence
> 6-10 : Strong evidence
> > 10 : Very strong evidence
>
> So the kind of difference that Michael found would to all
> intends and purposes mean that the logit and probit models are
> indistinguishable.
>
> Hope this helps,
> Maarten
>
> Adrian E. Raftery (1995) "Bayesian Model Selection in Social
> Research", Sociological Methodology, Vol. 25, pp. 111-163.
>
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
> http://www.maartenbuis.nl
> --------------------------
>
>
>
>
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