Truncated Harmonic Mean Estimator of the Marginal Likelihood for Block Models R package thamesblock version 0.1.0 Implements the truncated harmonic mean estimator (THAMES) and other estimators of the reciprocal marginal likelihood for block models. This is done via reciprocal importance sampling, using posterior samples and unnormalized log posterior values. For further information see Metodiev, Perrot-Dockès, Fouetilou, Latouche & Raftery (2026). Software Imports: mclust, stats, combinat, withr, Matrix, label.switching Martin Metodiev <m.metodiev@tutanota.com> Comprehensive R Archive Network (CRAN) Martin Metodiev [aut, cre, cph] (ORCID: <https://orcid.org/0009-0000-9432-3756>) GPL (>= 3) 2026-07-04 application/tgz https://CRAN.R-project.org/package=thamesblock doi:10.32614/CRAN.package.thamesblock