Package: attrition Title: Addressing Nonignorable Attrition with Double Sampling and Bounds Version: 1.0.0 Authors@R: c( person("Alexander", "Coppock", email = "acoppock@gmail.com", role = c("aut", "cre")), person("Alan S.", "Gerber", role = "aut"), person("Donald P.", "Green", role = "aut"), person("Holger L.", "Kern", role = "aut")) Description: Implements the double-sampling bounds estimator of Coppock, Gerber, Green, and Kern (2017) for randomized experiments with nonignorable missing outcomes. Provides worst-case (Manski) bounds, double-sampling bounds with analytic variance and Imbens-Manski confidence intervals, Lee (2009) trimming bounds with analytic and bootstrap standard errors, covariate adjustment via poststratification, and a sensitivity analysis for violations of the outcome stability assumption. Depends: R (>= 4.1.0) Imports: generics, ggplot2, tibble Encoding: UTF-8 License: GPL-3 URL: https://alexandercoppock.com/attrition/, https://github.com/acoppock/attrition BugReports: https://github.com/acoppock/attrition/issues Suggests: dplyr, estimatr, knitr, purrr, rmarkdown, testthat (>= 3.0.0), vayr (>= 1.1.0) VignetteBuilder: knitr Config/testthat/edition: 3 Config/roxygen2/version: 8.0.0 LazyData: true Language: en-US Repository: https://acoppock.r-universe.dev Date/Publication: 2026-09-21 00:32:56 UTC RemoteUrl: https://github.com/acoppock/attrition RemoteRef: HEAD RemoteSha: 162f979c44e5d28465d34ffe2d68b413b99ca3d5 NeedsCompilation: no Packaged: 2026-09-21 05:17:39 UTC; root Author: Alexander Coppock [aut, cre], Alan S. Gerber [aut], Donald P. Green [aut], Holger L. Kern [aut] Maintainer: Alexander Coppock