Modified Poisson Regression of Grouped and Right-Censored Counts R package GRCRegression version 1.0 Implement maximum likelihood estimation for Poisson generalized linear models with grouped and right-censored count data. Intended to be used for analyzing grouped and right-censored data, which is widely applied in many branches of social sciences. The algorithm implemented is described in Fu et al., (2021) <doi:10.1111/rssa.12678>. Software Depends: MASS, pracma Xin Guo <xin.guo@uq.edu.au> Comprehensive R Archive Network (CRAN) Xin Guo [aut, cph, cre], Qiang Fu [aut, cph] GPL (>= 3) 2023-06-26 application/tgz https://CRAN.R-project.org/package=GRCRegression doi:10.32614/CRAN.package.GRCRegression