Nonparametric Preprocessing for Parametric Causal Inference R package MatchIt version 4.7.2 CRAN Task View: CausalInference (https://CRAN.R-project.org/view=CausalInference) CRAN Task View: ClinicalTrials (https://CRAN.R-project.org/view=ClinicalTrials) CRAN Task View: OfficialStatistics (https://CRAN.R-project.org/view=OfficialStatistics) Selects matched samples of the original treated and control groups with similar covariate distributions -- can be used to match exactly on covariates, to match on propensity scores, or perform a variety of other matching procedures. The package also implements a series of recommendations offered in Ho, Imai, King, and Stuart (2007) <DOI:10.1093/pan/mpl013>. (The 'gurobi' package, which is not on CRAN, is optional and comes with an installation of the Gurobi Optimizer, available at <https://www.gurobi.com>.) Software Depends: R (>= 3.6.0) Imports: backports (>= 1.1.9), chk (>= 0.10.0), rlang (>= 1.1.0), Rcpp, utils, stats, graphics, grDevices LinkingTo: Rcpp, RcppProgress Suggests: optmatch (>= 0.10.6), Matching, rgenoud, quickmatch (>= 0.2.1), nnet, rpart, mgcv, CBPS (>= 0.17), dbarts (>= 0.9-28), randomForest (>= 4.7-1), glmnet (>= 4.0), gbm (>= 2.1.7), cobalt (>= 4.2.3), boot, marginaleffects (>= 0.25.0), sandwich (>= 2.5-1), survival, RcppProgress (>= 0.4.2), highs, Rglpk, Rsymphony, gurobi, knitr, rmarkdown, testthat (>= 3.0.0) Noah Greifer <noah.greifer@gmail.com> Comprehensive R Archive Network (CRAN) Daniel Ho [aut] (ORCID: <https://orcid.org/0000-0002-2195-5469>), Kosuke Imai [aut] (ORCID: <https://orcid.org/0000-0002-2748-1022>), Gary King [aut] (ORCID: <https://orcid.org/0000-0002-5327-7631>), Elizabeth Stuart [aut] (ORCID: <https://orcid.org/0000-0002-9042-8611>), Alex Whitworth [ctb], Noah Greifer [cre, aut] (ORCID: <https://orcid.org/0000-0003-3067-7154>) GPL (>= 2) 2025-05-30 application/tgz https://CRAN.R-project.org/package=MatchIt doi:10.32614/CRAN.package.MatchIt