Sensitivity of Formula Instrument to Shock Design R package formulaiv version 0.1.0 Functions to implement the formula instrument method in Borusyak and Hull (2023) <doi:10.3982/ECTA19367> and examine its sensitivity to the assumed distributional of counterfactual shocks. Software Depends: R (>= 3.5) Imports: stats, lpSolve Suggests: testthat (>= 3.0.0), knitr, rmarkdown Peizan Sheng <peizan@uchicago.edu> Comprehensive R Archive Network (CRAN) Peizan Sheng [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=formulaiv/LICENSE) 2026-06-24 application/tgz https://CRAN.R-project.org/package=formulaiv doi:10.32614/CRAN.package.formulaiv