None, except when the bootstrap is used correctly to fully document how well or poorly the modeling strategy worked and one is not interested in doing better or hasn't the time to do so.
Cheers, Frank Bert Gunter wrote > > ... which begs the question: In what context is it valid? ;-) > > -- Bert > > On Tue, Jul 24, 2012 at 3:00 PM, Frank Harrell <f.harrell@> wrote: >> Stepwise variable selection is invalid in this context. >> Frank >> >> Diana Marcela Martinez Ruiz wrote >>> >>> Hello, >>> >>> I want to know how to perform stepwise elimination of variables to >>> svyglm >>> >>> thanks >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> R-help@ mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> >> >> >> ----- >> Frank Harrell >> Department of Biostatistics, Vanderbilt University >> -- >> View this message in context: >> http://r.789695.n4.nabble.com/stepwise-in-svyglm-tp4637679p4637680.html >> Sent from the R help mailing list archive at Nabble.com. >> >> ______________________________________________ >> R-help@ mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > > > > -- > > Bert Gunter > Genentech Nonclinical Biostatistics > > Internal Contact Info: > Phone: 467-7374 > Website: > http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm > > ______________________________________________ > R-help@ mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/stepwise-in-svyglm-tp4637679p4637800.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
