attrition: Addressing Nonignorable Attrition with Double Sampling and Bounds

Implements the double-sampling bounds estimator of Coppock, Gerber, Green, and Kern (2017) <doi:10.1017/pan.2016.6> 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) <doi:10.1111/j.1467-937X.2009.00536.x> trimming bounds with analytic and bootstrap standard errors, covariate adjustment via poststratification, and a sensitivity analysis for violations of the outcome stability assumption.

Version: 1.0.0
Depends: R (≥ 4.1.0)
Imports: generics, ggplot2, tibble
Suggests: dplyr, estimatr, knitr, purrr, rmarkdown, testthat (≥ 3.0.0), vayr (≥ 1.1.0)
Published: 2026-09-18
DOI: 10.32614/CRAN.package.attrition (may not be active yet)
Author: Alexander Coppock [aut, cre], Alan S. Gerber [aut], Donald P. Green [aut], Holger L. Kern [aut]
Maintainer: Alexander Coppock <acoppock at gmail.com>
BugReports: https://github.com/acoppock/attrition/issues
License: GPL-3
URL: https://alexandercoppock.com/attrition/, https://github.com/acoppock/attrition
NeedsCompilation: no
Language: en-US
Materials: README, NEWS
CRAN checks: attrition results

Documentation:

Reference manual: attrition.html , attrition.pdf
Vignettes: Bounding treatment effects when experiments encounter attrition (source, R code)

Downloads:

Package source: attrition_1.0.0.tar.gz
Windows binaries: r-devel: not available, r-release: not available, r-oldrel: not available
macOS binaries: r-release (arm64): not available, r-oldrel (arm64): not available, r-release (x86_64): attrition_1.0.0.tgz, r-oldrel (x86_64): attrition_1.0.0.tgz

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