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RE: st: Re: Brant test


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Re: Brant test
Date   Sat, 18 Oct 2008 17:09:51 +0200

Has http://www.stata-press.com/books/regmodcdvs.html (pp.199-200) been
mentioned yet? They are probably a good point of entry, being the authors of
the command...


HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Richard Williams
Sent: Saturday, October 18, 2008 6:07 PM
To: statalist@hsphsun2.harvard.edu; statalist@hsphsun2.harvard.edu
Subject: RE: st: Re: Brant test

At 08:24 AM 10/18/2008, Gao LIU wrote:
>The results are similar, but not the same. What might cause the difference?
>
>Gao

Brant and gologit2 take different approaches.  They generally are 
pretty close on the global test but might differ on tests of 
individual variables.  You can also try out -omodel- from SSC.

The way to do a global test in gologit2 is something like

gologit2 y x1 x2 x3, pl store(m1)
gologit2 y x1 x2 x3, npl store(m2)
lrtest m1 m2, stats

For more on gologit2, see

http://www.nd.edu/~rwilliam/gologit2/index.html


-------------------------------------------
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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