logistf: Firth's Bias-Reduced Logistic Regression

Fit a logistic regression model using Firth's bias reduction method, equivalent to penalization of the log-likelihood 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, see Heinze and Schemper (2002) <doi:10.1002/sim.1047>. If needed, the bias reduction can be turned off such that ordinary maximum likelihood logistic regression is obtained. Two new modifications of Firth's method, FLIC and FLAC, lead to unbiased predictions and are now available in the package as well, see Puhr, Heinze, Nold, Lusa and Geroldinger (2017) <doi:10.1002/sim.7273>.

Getting started

Package details

AuthorGeorg Heinze [aut, cre], Meinhard Ploner [aut], Daniela Dunkler [ctb], Harry Southworth [ctb], Lena Jiricka [aut]
MaintainerGeorg Heinze <georg.heinze@meduniwien.ac.at>
LicenseGPL
Version1.24
URL https://cemsiis.meduniwien.ac.at/en/kb/science-research/software/statistical-software/fllogistf/
Package repositoryView on CRAN
Installation Install the latest version of this package by entering the following in R:
install.packages("logistf")

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logistf documentation built on Sept. 16, 2020, 9:07 a.m.