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Re: st: logistic regression different results


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: logistic regression different results
Date   Sat, 26 Apr 2008 17:29:56 +0100 (BST)

There are many arguments why you should not use stepwise at. A nice
collection can be found here:
http://www.stata.com/support/faqs/stat/stepwise.html

--Maarten

--- "stefan.duke@gmail.com" <stefan.duke@gmail.com> wrote:

> I found the mistake.
> Sorry for bothering!
> Stefan
> 
> On Sat, Apr 26, 2008 at 5:44 PM, stefan.duke@gmail.com
> <stefan.duke@gmail.com> wrote:
> > Hello,
> >
> >  I am running a multiple logistic regression with a backward
> elimination
> >
> >  sw  logit y x v1 v2 v3 v4 v5 v6 v7 v8, pr(.05)
> >
> >  logit y x
> >
> >
> >  I arrive at the final model (y x). But if I run the final model
> right
> >  away I get different numbers than when I use backward elimination
> to
> >  reach the final model.
> >  Any clues?
> >  Thanks,
> >  Stefan
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> 


-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


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