Isn't the binomial-log used to obtain risk ratios from the coefficients rather than odds-ratios?
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thomas Lumley Sent: Wednesday, September 10, 2008 4:36 PM To: Prof Brian Ripley Cc: r-help@r-project.org; Ben Bolker Subject: Re: [R] binomial(link="inverse") On Wed, 10 Sep 2008, Prof Brian Ripley wrote: > > As to why the list of links known by name is as it is, that seems > history. in part the White Book history of S. I've always thought it an error that 'log' > was a standard link for binomial, as the range does not match the > specification of probabilities (and S did not do so, MASS Table 7.1 ). I think I added binomial("log"): log-binomial regression is quite popular and useful in epidemiology (where effect sizes are small enough that keeping away from the boundary may be less of a problem than people's inability to understand odds ratios). As a side note, in (some versions of) S, due to partial matching, binomial("log") is valid -- it just does logistic regression. -thomas Thomas Lumley Assoc. Professor, Biostatistics [EMAIL PROTECTED] University of Washington, Seattle ______________________________________________ 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. ______________________________________________ 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.
