dea_est                 DEA, FDH and linearized FDH estimators.
green                   American electric utility companies
loc_est                 Local linear frontier estimator
loc_est_bw              Bootstrap bandwidth selection for the local
                        linear frontier estimator
npbr-package            Nonparametric boundary regression
nuclear                 Reliability programs of nuclear reactors
poly_est                Polynomial-based edge estimators
quad_spline_est         Constrained quadratic spline frontiers
quad_spline_est_kn      AIC (or BIC) criterion for choosing the number
                        of knots for quadratic splines
