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Re: st: Test of ordered probit vs ordinary probits


From   Richard Williams <Richard.A.Williams.5@ND.edu>
To   statalist@hsphsun2.harvard.edu, <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Test of ordered probit vs ordinary probits
Date   Wed, 31 Oct 2007 15:26:51 -0400

At 03:07 PM 10/31/2007, Schaffer, Mark E wrote:
Hi everybody. I have a question about ordered probits that follows on from the FAQ by Bill Gould about the role of the constant/cutoffs:
The assumptions of the ordered logit model can be tested via the -brant- command, which is part of the -spost9- package of Long and Freese.

Ordered logit and ordered probit assumptions can be tested via Wolfe & Gould's -omodel- command.

Assumptions of ologit & oprobit can also be tested via my -gologit2- command. Further, gologit2 provides a means of selectively relaxing constraints on individual variables when assumptions are violated while maintaining them when not violated. More on gologit2 at

http://www.nd.edu/~rwilliam/gologit2/index.html

Everything except -spost9- is available from SSC. -spost9- is maintained directly by Long. All of this can be found with -findit-.


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Richard Williams, Notre Dame Dept of Sociology
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