Cox Regression with Firth's Penalized Likelihood R package coxphf version 1.13.4 CRAN Task View: Survival (https://CRAN.R-project.org/view=Survival) Implements Firth's penalized maximum likelihood bias reduction method for Cox regression which has been shown to provide a solution in case of monotone likelihood (nonconvergence of likelihood function), see Heinze and Schemper (2001) and Heinze and Dunkler (2008). The program fits profile penalized likelihood confidence intervals which were proved to outperform Wald confidence intervals. Software Depends: R (>= 3.5.0) Imports: survival, generics, tibble Georg Heinze <georg.heinze@meduniwien.ac.at> Comprehensive R Archive Network (CRAN) Georg Heinze [aut, cre], Meinhard Ploner [aut], Lena Jiricka [aut], Gregor Steiner [aut] GPL 2023-08-11 application/tgz https://CRAN.R-project.org/package=coxphf doi:10.32614/CRAN.package.coxphf