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From | "Michael N. Mitchell" <Michael.Norman.Mitchell@gmail.com> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: probit vs. logit |
Date | Tue, 25 May 2010 10:05:15 -0700 |
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.htmlIf 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 evidence10 : Very strong evidenceSo 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 -------------------------- * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/
* * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/