Fit Normal, Student-t or Contaminated Normal Heckman Selection Models R package HeckmanEM version 0.2-2 It performs maximum likelihood estimation for the Heckman selection model (Normal, Student-t or Contaminated normal) using an EM-algorithm <doi:10.1016/j.jmva.2021.104737>. It also performs influence diagnostic through global and local influence for four possible perturbation schema. Software Imports: mvtnorm (>= 1.1-0), sampleSelection (>= 1.2-6), MomTrunc (>= 5.79), PerformanceAnalytics (>= 2.0.4), ggplot2, methods Marcos Prates <marcosop@est.ufmg.br> Comprehensive R Archive Network (CRAN) Marcos Prates [aut, cre, trl] (ORCID: <https://orcid.org/0000-0001-8077-4898>), Victor Lachos [aut] (ORCID: <https://orcid.org/0000-0002-7239-2459>), Dipak Dey [aut], Marcos Oliveira [aut, ctb], Christian Galarza [ctb], Katherine Loor [ctb], Alejandro Ordonez [ctb] GPL-2 2025-06-02 application/tgz https://CRAN.R-project.org/package=HeckmanEM doi:10.32614/CRAN.package.HeckmanEM