Optimal Policy Learning R package OPL version 1.0.2 Provides functions for optimal policy learning in socioeconomic applications helping users to learn the most effective policies based on data in order to maximize empirical welfare. Specifically, 'OPL' allows to find "treatment assignment rules" that maximize the overall welfare, defined as the sum of the policy effects estimated over all the policy beneficiaries. Documentation about 'OPL' is provided by several international articles via Athey et al (2021, <doi:10.3982/ECTA15732>), Kitagawa et al (2018, <doi:10.3982/ECTA13288>), Cerulli (2022, <doi:10.1080/13504851.2022.2032577>), the paper by Cerulli (2021, <doi:10.1080/13504851.2020.1820939>) and the book by Gareth et al (2013, <doi:10.1007/978-1-4614-7138-7>). Software Imports: stats, dplyr, ggplot2, pander, randomForest, tidyr Suggests: knitr, rmarkdown Federico Brogi <federicobrogi@gmail.com> Comprehensive R Archive Network (CRAN) Federico Brogi [aut, cre], Barbara Guardabascio [aut], Giovanni Cerulli [aut] GPL-3 2025-02-27 application/tgz https://CRAN.R-project.org/package=OPL doi:10.32614/CRAN.package.OPL