[R] stepwise selection for conditional logistic regression

Frank Harrell f.harrell at vanderbilt.edu
Wed Feb 22 14:22:51 CET 2012

Stepwise variable selection is an invalid statistical method.  Who or which
book recommended it?

Subha P. T. wrote
>  Hi,
> Is there any function available to do stepwise selection of variables in
> Conditional(matched) logistic regression( clogit)? step, stepwise  etc are
> failing in case of conditional logistic regression. Please help. 
> Thanks
> P.T. Subha
> 	[[alternative HTML version deleted]]
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Frank Harrell
Department of Biostatistics, Vanderbilt University
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