Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: Re: Brant test


From   Gao LIU <[email protected]>
To   <[email protected]>
Subject   st: Re: Brant test
Date   Sat, 18 Oct 2008 09:43:58 -0400

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
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> *
>>> *   For searches and help try:
>>> *   http://www.stata.com/help.cgi?search
>>> *   http://www.stata.com/support/statalist/faq
>>> *   http://www.ats.ucla.edu/stat/stata/
>>>
>>
>>
>> *
>> *   For searches and help try:
>> *   http://www.stata.com/help.cgi?search
>> *   http://www.stata.com/support/statalist/faq
>> *   http://www.ats.ucla.edu/stat/stata/
>>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
> 


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index