Variance-Based Sensitivity Analysis for Weighting Estimators R package vbm version 0.1.0 Provides methods for variance-based sensitivity analysis and weighting estimators in observational studies based on methodology by Huang & Pimentel (2025) <doi:10.1093/biomet/asae040>. Includes bootstrap inference, bias bounds estimation, and visualization tools for sensitivity parameters. Software Imports: parallel, magrittr, dplyr, WeightIt, estimatr, ggplot2, scales Suggests: jointVIP, knitr, rmarkdown, pkgdown, cobalt, osqp Jiayao Gan <u3612852@connect.hku.hk> Comprehensive R Archive Network (CRAN) Jiayao Gan [aut, cre], Melody Huang [aut], Samuel D. Pimentel [aut], Andy A. Shen [aut], National Science Foundation [fnd] (Grant #2142146) MIT + file LICENSE (https://CRAN.R-project.org/package=vbm/LICENSE) 2026-06-30 application/tgz https://CRAN.R-project.org/package=vbm doi:10.32614/CRAN.package.vbm