Optimal Nonparametric Testing of Missing Completely at Random R package MCARtest version 1.3 Provides functions for carrying out nonparametric hypothesis tests of the MCAR hypothesis based on the theory of Frechet classes and compatibility. Also gives functions for computing halfspace representations of the marginal polytope and related geometric objects. Software Imports: lpSolve, rcdd, gtools, Epi, Rdpack, Rcpp, pracma, highs, Matrix, Rcsdp, norm, missMethods, copula, MASS LinkingTo: Rcpp Thomas B. Berrett <tom.berrett@warwick.ac.uk> Comprehensive R Archive Network (CRAN) Thomas B. Berrett [aut, cre] (ORCID: <https://orcid.org/0000-0002-2005-110X>), Alberto Bordino [aut], Danat Duisenbekov [aut], Sean Jaffe [aut], Richard J. Samworth [aut] (ORCID: <https://orcid.org/0000-0003-2426-4679>) MIT + file LICENSE (https://CRAN.R-project.org/package=MCARtest/LICENSE) 2025-06-26 application/tgz https://CRAN.R-project.org/package=MCARtest doi:10.32614/CRAN.package.MCARtest