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# st: Re: St: Logistic regression & standardized coefficients; Multinomial GOF test

 From Ronald McDowell To "statalist@hsphsun2.harvard.edu" Subject st: Re: St: Logistic regression & standardized coefficients; Multinomial GOF test Date Wed, 7 Dec 2011 14:31:45 +0000

```Richard

Thanks for the excellent references (below). A follow-up question is whether there is such a thing as standardized coefficients in multinomial logistic regression models,
and if so if there are any parallel references.

Many thanks

Ron McDowell
-----------------------------------------
Ron McDowell
Institute of Nursing Research
University of Ulster, Coleraine
McDowell-R3@email.ulster.ac.uk

Date: Tue, 06 Dec 2011 12:14:22 -0500
From: Richard Williams <richardwilliams.ndu@gmail.com>
Subject: Re: st: St: Logistic regression & standardized coefficients; Multinomial GOF test

At 11:55 AM 12/6/2011, Ronald McDowell wrote:
>Hi all
>
>1. I've been looking at some materials online about standardized
>coefficients in logistic regression eg.
>
>
>http://www.nd.edu/~rwilliam/stats3/L06.pdf
>
>Full standardization includes dividing the estimated coefficients by
>the standard deviation of Y*. Can someone clarify for me what
>exactly Y* is ? I'm aware it is a function of the fitted values. I
>have used listcoef and fitstat to obtain sd(Y*) so far, but
>  would like to be able to manually compute it.

See Long & Freese's book for a detailed explanation:

http://www.stata.com/bookstore/regmodcdvs.html

For a mini-explanation, including how to compute manually, see

http://www.nd.edu/~rwilliam/xsoc73994/L03.pdf

For more advanced discussions, see the first 19 slides of

http://www.nd.edu/~rwilliam/stats/Oglm.pdf

Also take a look at the -khb- command on SSC and the papers
associated with it. The relevant papers may still be forthcoming so
you may need to write the authors if you want them.

Finally, I don't have the full citation handy, but Scott Menard
offered an alternative approach to Y-standardization in a 2010 issue
of Social Forces.

- -------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME:   (574)289-5227
EMAIL:  Richard.A.Williams.5@ND.Edu
WWW:    http://www.nd.edu/~rwilliam

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