Yes, that's exatly what I needed!
Thanks a lot for your help, Richard -
best wishes,
Kristin
> At 07:11 PM 12/1/2007, Kristin J. Kleinjans wrote:
>>Here is in more detail what I would like to do:
>>I have an outcome with 5 levels, and the brant command after ologit
>> found that for the independent variable female the parallel regression
>>assumption is violated. I run gologit2 allowing the coefficient on
>> female to differ depending on the level of the dependent variable and
>> get, therefore, four different coefficients:
>>1.871***, 1.835***, 1.480***, 1.397***.
>>
>>I need to formally test whether each of these four coefficients is
>> different from the others. For variables which are not allowed to
>> differ, I can simply do a test
>>test _b[var1]==_b[var2], but I cannot figure out how to call up a
>> coefficient depending on the level.
>
> Do you want something like this?
>
> . use "http://www.indiana.edu/~jslsoc/stata/spex_data/ordwarm2.dta"; (77
> & 89 General Social Survey)
>
> . gologit2 warm male
>
> Generalized Ordered Logit Estimates Number of obs =
> 2293
> LR chi2(3) =
> 94.05 Prob > chi2
> = 0.0000
> Log likelihood = -2948.7475 Pseudo R2 =
> 0.0157
>
> ------------------------------------------------------------------------------
> warm | Coef. Std. Err. z P>|z| [95% Conf.
> Interval]
> -------------+----------------------------------------------------------------
> 1SD |
> male | -.3089732 .1246748 -2.48 0.013 -.5533313
> -.0646151
> _cons | 2.057623 .0900742 22.84 0.000 1.88108
> 2.234165
> -------------+----------------------------------------------------------------
> 2D |
> male | -.5981885 .085043 -7.03 0.000 -.7648697
> -.4315073
> _cons | .504311 .0589211 8.56 0.000 .3888278
> .6197941
> -------------+----------------------------------------------------------------
> 3A |
> male | -1.021626 .1194645 -8.55 0.000 -1.255772
> -.7874794
> _cons | -1.110602 .0661279 -16.79 0.000 -1.24021
> -.9809933
> ------------------------------------------------------------------------------
>
> . test [#1]male = [#2]male
>
> ( 1) [1SD]male - [2D]male = 0
>
> chi2( 1) = 6.11
> Prob > chi2 = 0.0134
>
> . test [#2]male = [#3]male
>
> ( 1) [2D]male - [3A]male = 0
>
> chi2( 1) = 13.16
> Prob > chi2 = 0.0003
>
> Anyway, using the equation number is the simplest way to refer to
> individual equations.
>
>
> -------------------------------------------
> Richard Williams, Notre Dame Dept of Sociology
> OFFICE: (574)631-6668, (574)631-6463
> HOME: (574)289-5227
> EMAIL: [email protected]
> WWW: http://www.nd.edu/~rwilliam
>
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