Manipulation Testing Based on Density Discontinuity R package rddensity version 3.0 CRAN Task View: Econometrics (https://CRAN.R-project.org/view=Econometrics) Density discontinuity testing (a.k.a. manipulation testing) is commonly employed in regression discontinuity designs and other program evaluation settings to detect perfect self-selection (manipulation) around a cutoff where treatment/policy assignment changes. This package implements manipulation testing procedures using local polynomial density estimators: rddensity() constructs test statistics and p-values given a prespecified cutoff, rdbwdensity() performs data-driven bandwidth selection, and rdplotdensity() constructs density plots. Software Depends: R (>= 3.1.0) Imports: ggplot2, lpdensity (>= 2.2) Suggests: testthat (>= 3.0.0) Matias D. Cattaneo <matias.d.cattaneo@gmail.com> Comprehensive R Archive Network (CRAN) Matias D. Cattaneo [aut, cre], Michael Jansson [aut], Xinwei Ma [aut] GPL-3 2026-05-21 application/tgz https://CRAN.R-project.org/package=rddensity doi:10.32614/CRAN.package.rddensity