Unless the number of covariate patterns is
substantially less than the number of cases, I'm not
certain that standard regression diagnostics are
terribly useful in logistic regression--the issue of
cutoff scores is moot.
SR Millis
--- Mariano Sana <[email protected]> wrote:
> To detect influential cases in binary regression,
> Long & Freese (2003: 128)
> and Long (1997:101) mention Pregibon?s beta, a
> statistic that is "the
> counterpart to Cook?s distance for the linear
> regression model." In Stata,
> you get Pregibon's betas by using -predict- with the
> option dbeta.
>
> Long and Freese do not give any particular rule of
> thumb about what value
> of this statistic would be a good threshold (i.e.,
> above that value we
> worry, below that value we don?t).
=====
Scott R Millis, PhD, MEd, ABPP (CN & RP)
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