Data Envelopment Analysis for Pollution-Generating Technologies R package pgt version 0.5.0 Nonparametric efficiency analysis for pollution-generating technologies under the materials-balance principle. Implements the weak-G-disposability model of Rodseth (2025) <doi:10.1007/s11123-025-00768-0> and its factorially determined multi-output representation, the by-production intersection technology of Murty, Russell and Levkoff (2012) <doi:10.1016/j.jeem.2012.02.005>, the materials-balance cost model of Coelli, Lauwers and Van Huylenbroeck (2007) <doi:10.1007/s11123-007-0052-8> and a weak-disposability reference model, with an enforced materials-balance identity, a pre-estimation feasibility audit, metafrontier decompositions, bad-output shadow prices, marginal abatement cost curves, a cross-axiom comparison harness, a global Malmquist-Luenberger productivity index and subsampling inference. Estimators are solved with 'lpSolveAPI'. Software Depends: R (>= 4.0.0) Imports: stats, graphics, utils, lpSolveAPI Suggests: testthat (>= 3.0.0), knitr, rmarkdown, frontier Erik Enstad <erik.enstad@nhh.no> Comprehensive R Archive Network (CRAN) Erik Enstad [aut, cre] (ORCID: <https://orcid.org/0009-0006-1053-3849>) GPL (>= 3) 2026-07-28 application/tgz https://CRAN.R-project.org/package=pgt doi:10.32614/CRAN.package.pgt