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Re: st: Stepwise (m)logit


From   "E. Paul Wileyto" <epw@mail.med.upenn.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Stepwise (m)logit
Date   Tue, 18 Sep 2007 10:58:31 -0400

Look up "stepwise" in the reference manuals. You control this with the proper use of parentheses, and the option "lockterm1"

Put the X terms you want to keep first, and enclose the group in parens. Add "lockterm1" to the options, and stepwise will keep everything in that first set of parens.

Paul

Hendri Adriaens wrote:

Hello,

Is it possible to do a stepwise logit where we can state a set of variables
that should always be included and not dropped? -stepwise- doesn't have an
option for that it seems, but maybe there is another command that does have
this?

And is it possible to do a stepwise multinomial logit?

Thanks already, best regards,
-Hendri Adriaens.

---------------------------------------- Hendri Adriaens Researcher CentERdata Tilburg University Room K638 Postal address: PO Box 90153, 5000 LE
Visiting address: Warandelaan 2, 5037 AB Tilburg, The Netherlands Tel.: +31-13-466 3263 / 8325
Fax.: +31-13-466 2764 E-mail: hendri@uvt.nl
WWW: http://www.centerdata.nl


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--
E. Paul Wileyto, Ph.D.
Assistant Professor of Biostatistics
Tobacco Use Research Center
School of Medicine, U. of Pennsylvania
3535 Market Street, Suite 4100
Philadelphia, PA 19104-3309

215-746-7147
Fax: 215-746-7140
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http://mail.med.upenn.edu/~epw/
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