Fast Estimation of CUB Models via Louis' Identity R package FastCUB version 0.0.4 For ordinal rating data, consider the accelerated EM algorithm to estimate and test models within the family of CUB models (where CUB stands for Combination of a discrete Uniform and a shifted Binomial distributions). The procedure is built upon Louis' identity for the observed information matrix. Best-subset variable selection is then implemented since it becomes more feasible from the computational point of view. Software Depends: R (>= 2.15.2) Imports: methods, Formula, utils, CUB Rosaria Simone <rosaria.simone@unina.it> Comprehensive R Archive Network (CRAN) Rosaria Simone [aut, cre] GPL-2 GPL-3 2025-07-24 application/tgz https://CRAN.R-project.org/package=FastCUB doi:10.32614/CRAN.package.FastCUB