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Re: st: Stata's pseudo R-squared for oprobit

From   Richard Williams <>
Subject   Re: st: Stata's pseudo R-squared for oprobit
Date   Wed, 12 Oct 2005 13:32:05 -0500

At 01:10 PM 10/12/2005, Ramani Gunatilaka wrote:
Hi Statalist,
I have not been able to find a definition of the particular pseudo
R-squared that Stata reports with the results of an oprobit regression
in either the manuals or in the list archives.
As I understand, there are many pseudo R-squareds around. Can someone
please tell me whether the one Stata reports is Maddala's (1983) or
Zavoina and McKelvey's (1975) or something else?
Thanks a lot,
McFadden's R^2. Several other pseudo R^2 measures are available with -fitstat-, which is part of the Long and Freese -spost- routines for categorical data analysis. A discussion of these various measures is available at

Richard Williams, Notre Dame Dept of Sociology
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