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Re: st: Test of ordered probit vs ordinary probits

From   Richard Williams <>
To, <>
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

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

Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: Richard.A.Williams.5@ND.Edu

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