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Re: st: question about the Brant test


From   Richard Williams <Richard.A.Williams.5@ND.edu>
To   statalist@hsphsun2.harvard.edu, statalist@hsphsun2.harvard.edu
Subject   Re: st: question about the Brant test
Date   Tue, 18 Mar 2008 00:21:55 -0500

At 04:53 PM 3/17/2008, Christopher Parker wrote:
A little help with the brant test. I'm trying to determine whether or not
the proportional odds ratio is violated for an ordinal-level dependent
variable. However, after I estimate the ordered logit model, and type the
command for the brant test, I get an error message: y>:  operator invalid.

Can someone advise me on this?
Christopher and I exchanged some messages off list and I was able to replicate the problem. His dependent variable was coded 0, .25, .5, .75 and 1. That is fine as far as ologit is concerned but the brant command doesn't like that. Recoding the variable to 1, 2, 3, 4, 5 solved the problem.


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

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