[R] robust polr

Prof Brian Ripley ripley at stats.ox.ac.uk
Sat Jul 21 07:28:34 CEST 2012

On 20/07/2012 22:06, Anthony Dick wrote:
> Hello,
> I am wondering if there is a robust estimation version of polr(),
> similar to the lm() -> rlm(). If not, can anyone suggest a way to do
> robust estimation with polr()?
> Thanks,
> Anthony

No: What would it mean to have a long-tailed distribution of a ordered 
categorical response?

There are ways to allow for misclassification  of training data in 
logistic regression, including polr, but they are very different in 
flavour and implementation from robust regression.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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