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st: Re: Brant test
The results are similar, but not the same. What might cause the difference?
Gao
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Martin Weiss
Sent: Saturday, October 18, 2008 9:17 AM
To: [email protected]
Subject: Re: st: Re: Brant test
Might want to try yourself with the example
http://www.ats.ucla.edu/stat/stata/dae/ologit.htm...
HTH
Martin
_______________________
----- Original Message -----
From: "Gao Liu" <[email protected]>
To: <[email protected]>
Sent: Saturday, October 18, 2008 3:12 PM
Subject: Re: st: Re: Brant test
> 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 <[email protected]>
> 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" <[email protected]>
>> To: <[email protected]>
>> 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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>>
>>
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