Infinitesimal Jackknife Standard Errors for 'brms' Models R package IJSE version 0.3.4 Computes infinitesimal jackknife standard errors and covariance matrices for posterior expectations from 'brms' models or matched posterior draws and pointwise log likelihoods. Supports independent and clustered sampling units, transformed quantities, blockwise likelihood evaluation, and chain stability diagnostics. References: Ji et al. (2026) <doi:10.3102/10769986251379738>; Giordano and Broderick (2024) <doi:10.48550/arXiv.2305.06466>. Software Depends: R (>= 3.5.0) Imports: posterior (>= 1.4.0), stats Suggests: brms (>= 2.20.0), testthat (>= 3.0.0), knitr, rmarkdown, ggplot2 (>= 3.4.0) Feng Ji <f.ji@utoronto.ca> Comprehensive R Archive Network (CRAN) Feng Ji [aut, cre] (ORCID: <https://orcid.org/0000-0002-2051-5453>), JoonHo Lee [aut], Sophia Rabe-Hesketh [aut] MIT + file LICENSE (https://CRAN.R-project.org/package=IJSE/LICENSE) 2026-10-22 application/tgz https://CRAN.R-project.org/package=IJSE doi:10.32614/CRAN.package.IJSE