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st: Re: Brant test


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: Brant test
Date   Sat, 18 Oct 2008 15:04:28 +0200

as -rnethelp "http://www.indiana.edu/~jslsoc/stata/spost9_ado/brant.hlp"- says:

"This is most likely not to be the case with models that have few observations in
the extreme categories and many independent variables."

HTH
Martin
_______________________
----- Original Message ----- From: "Gao LIU" <gao.liu@gmail.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Saturday, October 18, 2008 2:59 PM
Subject: st: Brant test


Dear Statalist:

I tried to test the parallel slopes assumption of ordered logit regression
using the brant command, and got an error message of "not all independent
variables can be retained in all binary logits, brant test cannot be
computed". Does anyone know what may be the reason? Thank you very much.

Best

Gao







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