The Design library's lrm and associated resid functions
provide diagnostics for the PO assumption. I prefer
graphical methods as some of the formal tests that
have been proposed are anti-conservative. -Frank Harrell
"Coppenolle, Hans" wrote:
>
> Hello,
>
> Does the possibility exist in s-plus 2000
> to test the proportional odds assumption
> when fitting a proportional odds model?
>
> The function polr seems not to include that
> property...
>
> How can the goodness of fit of a logistic proportional odds
> model and a generalized (baseline) logistic model
> efficiently be compared??
>
> Thank you in advance...
>
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--
Frank E Harrell Jr Prof. of Biostatistics & Statistics
Div. of Biostatistics & Epidem. Dept. of Health Evaluation Sciences
U. Virginia School of Medicine http://hesweb1.med.virginia.edu/biostat
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