Package: clubSandwich Title: Cluster-Robust (Sandwich) Variance Estimators with Small-Sample Corrections Version: 0.7.0 Authors@R: c( person(c("James","E."), "Pustejovsky", email = "jepusto@gmail.com", role = c("aut", "cre"), comment = c(ORCID = "0000-0003-0591-9465")), person("Hazim", "Izani", email = "hazimizani@gmail.com", role = "ctb"), person("Samuel", "Pekofsky", email = "sampekofsky@gmail.com", role = "ctb"), person("Jingru", "Zhang", email = "jz26372022@hotmail.com", role = "ctb") ) Description: Provides several cluster-robust variance estimators (i.e., sandwich estimators) for ordinary and weighted least squares linear regression models, including the bias-reduced linearization estimator introduced by Bell and McCaffrey (2002) and developed further by Pustejovsky and Tipton (2017) . The package includes functions for estimating the variance- covariance matrix and for testing single- and multiple- contrast hypotheses based on Wald test statistics. Tests of single regression coefficients use Satterthwaite or saddle-point corrections. Tests of multiple- contrast hypotheses use an approximation to Hotelling's T-squared distribution. Methods are provided for a variety of fitted models, including lm() and mlm objects; glm(); geeglm() (from package 'geepack'); lm_robust(), lm_lin(), and iv_robust() (from package 'estimatr'); ivreg() (from package 'AER'); ivreg() (from package 'ivreg' when estimated by ordinary least squares); plm() (from package 'plm'); gls() and lme() (from 'nlme'); lmer() (from `lme4`); robu() (from 'robumeta'); rma.uni() and rma.mv() (from 'metafor'); and mmrm() (from 'mmrm'). URL: http://jepusto.github.io/clubSandwich/ BugReports: https://github.com/jepusto/clubSandwich/issues Depends: R (>= 3.0.0) License: GPL-3 VignetteBuilder: knitr LazyData: true Imports: stats, sandwich, lifecycle Suggests: Formula, knitr, testthat, rmarkdown, covr, AER, carData, estimatr, fixest, geepack, ivreg, Matrix, lme4, metafor, metadat, mlmRev, mmrm, nlme, plm (>= 1.6-4), robumeta, zoo RoxygenNote: 7.3.3 Encoding: UTF-8 Language: en-US NeedsCompilation: no Packaged: 2026-05-01 14:23:22 UTC; jamespustejovsky Author: James E. Pustejovsky [aut, cre] (ORCID: ), Hazim Izani [ctb], Samuel Pekofsky [ctb], Jingru Zhang [ctb] Maintainer: James E. Pustejovsky Repository: CRAN Date/Publication: 2026-05-04 05:41:13 UTC Built: R 4.3.3; ; 2026-05-24 04:38:36 UTC; unix RemoteType: standard RemotePkgRef: clubSandwich RemoteRef: clubSandwich RemoteRepos: https://cloud.r-project.org RemoteSha: 0.7.0