Ordered Probit Switching Regression R package OPSR version 1.0.1 Estimates ordered probit switching regression models - a Heckman type selection model with an ordinal selection and continuous outcomes. Different model specifications are allowed for each treatment/regime. For more details on the method, see Wang & Mokhtarian (2024) <doi:10.1016/j.tra.2024.104072> or Chiburis & Lokshin (2007) <doi:10.1177/1536867X0700700202>. Software Depends: R (>= 3.5.0) Imports: car, Formula, graphics, MASS, maxLik, methods, mvtnorm, Rcpp, Rdpack (>= 0.7), sandwich, stats, texreg, utils LinkingTo: Rcpp, RcppArmadillo Suggests: gridExtra, gridGraphics, sampleSelection, scales, testthat (>= 3.0.0) Daniel Heimgartner <d.heimgartners@gmail.com> Comprehensive R Archive Network (CRAN) Daniel Heimgartner [aut, cre, cph] (ORCID: <https://orcid.org/0000-0002-0643-8690>), Xinyi Wang [aut] (ORCID: <https://orcid.org/0000-0002-3564-9147>) GPL (>= 3) 2025-07-28 application/tgz https://CRAN.R-project.org/package=OPSR doi:10.32614/CRAN.package.OPSR