Leave-Out Variance Component Estimation for Two-Way Fixed Effects Models R package LeaveOutKSS version 0.1.0 Implements leave-out estimation of variance components in two-way fixed effects models as an 'R' translation of the original 'MATLAB' package of Kline, Saggio, and Solvsten (2020) <doi:10.3982/ECTA16410>. The package includes graph-based connected-set pruning, leave-out bias correction, leverage computation by exact and randomized algorithms, fixed effect estimation helpers, and companion model-fit summaries for matched worker-firm panels in the spirit of Abowd, Kramarz, and Margolis (1999) <doi:10.1111/1468-0262.00020>. Software Imports: data.table, Matrix, igraph, sanic, parallel, utils, doParallel, foreach Suggests: knitr, rmarkdown, testthat (>= 3.0.0) Vahid Moghani <contact@vahid-moghani.com> Comprehensive R Archive Network (CRAN) Vahid Moghani [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=LeaveOutKSS/LICENSE) 2026-04-21 application/tgz https://CRAN.R-project.org/package=LeaveOutKSS doi:10.32614/CRAN.package.LeaveOutKSS