Re: st: Brant test after oprobit: Help with syntax?

[Richard Williams <richardwilliams.ndu@gmail.com>]

At 08:22 AM 9/13/2010, Andreas Tiemann wrote:
> Dear Stata Listers,
>
> I'm trying to conduct a Brant test after running an ordered probit
> regression. The test is "canned" into the file brant.ado for
> postestimation after ologit. While Greene & Hensher describe how to
> adjust the test to the oprobit setting, there is no syntax/ado
> available.
There are at least two ways of doing tests very similar to brant 
using probit models.  Download and install -omodel- and/or -gologit2- 
from SSC. Here is an example using both commands:
use "http://www.indiana.edu/~jslsoc/stata/spex_data/ordwarm2.dta";, clear
omodel probit  warm yr89 male white age ed prst
gologit2  warm yr89 male white age ed prst, pl sto(oprobit) link(p)
gologit2  warm yr89 male white age ed prst, npl sto(goprobit) link(p)
lrtest oprobit goprobit, stats

gologit2 also offers a means to relax constraints on those variables 
that violate the parallel lines assumption.  For more, see the support page at
http://www.nd.edu/~rwilliam/gologit2/index.html


-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
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