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Fit a logistic regression model using Firth's bias reduction method, equivalent to penalization of the loglikelihood by the Jeffreys prior. Confidence intervals for regression coefficients can be computed by penalized profile likelihood. Firth's method was proposed as ideal solution to the problem of separation in logistic regression. If needed, the bias reduction can be turned off such that ordinary maximum likelihood logistic regression is obtained.
Package details 


Author  Georg Heinze [aut, cre], Meinhard Ploner [aut], Daniela Dunkler [ctb], Harry Southworth [ctb] 
Date of publication  20161219 17:15:26 
Maintainer  Georg Heinze <georg.heinze@meduniwien.ac.at> 
License  GPL 
Version  1.22 
URL  http://cemsiis.meduniwien.ac.at/en/kb/scienceresearch/software/statisticalsoftware/fllogistf/ 
Package repository  View on CRAN 
Installation 
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