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Re: st: Re: Brant test


From   "Gao Liu" <gao.liu@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: Brant test
Date   Sat, 18 Oct 2008 09:12:38 -0400

Thank you, Martin,

I guess that may be the reason, as some of the categories do have
relatively small number of observations. Since the Brant test does not
work, I used the gologit regression, and did Wald tests. Will they
generate the same results as those from the Brant test?

Thank you

Gao



On Sat, Oct 18, 2008 at 9:04 AM, Martin Weiss <martin.weiss1@gmx.de> wrote:
> 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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