Sample Selection Models R package sampleSelection version 1.2-14 CRAN Task View: CausalInference (https://CRAN.R-project.org/view=CausalInference) CRAN Task View: Econometrics (https://CRAN.R-project.org/view=Econometrics) Two-step and maximum likelihood estimation of Heckman-type sample selection models: standard sample selection models (Tobit-2), endogenous switching regression models (Tobit-5), sample selection models with binary dependent outcome variable, interval regression with sample selection (only ML estimation), and endogenous treatment effects models. These methods are described in the three vignettes that are included in this package and in econometric textbooks such as Greene (2011, Econometric Analysis, 7th edition, Pearson). Software Depends: R (>= 2.10), maxLik (>= 0.7-3), stats Imports: miscTools (>= 0.6-3), systemfit (>= 1.0-0), Formula (>= 1.1-1), VGAM (>= 1.1-1), mvtnorm (>= 0.9-9994) Suggests: lmtest, Ecdat Arne Henningsen <arne.henningsen@gmail.com> Comprehensive R Archive Network (CRAN) Arne Henningsen [aut, cre], Ott Toomet [aut], Sebastian Petersen [ctb] GPL (>= 2) 2026-01-20 application/tgz https://CRAN.R-project.org/package=sampleSelection doi:10.32614/CRAN.package.sampleSelection