boot_pgt                Subsampling inference for pollution-generating
                        efficiency scores
boot_pgt_sensitivity    Subsample-size sensitivity of subsampling
                        intervals
compare_models          Compare competing axiom systems on identical
                        data
mac_curve               Marginal abatement cost curve
mb_check                Audit the materials-balance identity
pgt                     Estimate a pollution-generating technology
                        model
pgt_decompose           Decompose environmental efficiency across
                        technology groups
pgt_ml                  Global Malmquist-Luenberger productivity index
pgt_tech                Construct a pollution-generating technology
pigfarms                Pig-finishing farms from Rodseth (2025), Table
                        1
shadow_prices           Extract shadow values from a pgt fit
steeldemo               Synthetic steel plant panel
