| npbr-package | Nonparametric boundary regression |
| air | European air controllers |
| cub_spline_est | Cubic spline fitting |
| cub_spline_kn | AIC and BIC criteria for choosing the number of inter-knot segments in cubic spline fits |
| dea_est | DEA, FDH and linearized FDH estimators. |
| dfs_momt | Moment frontier estimator |
| dfs_pick | Pickands frontier estimator |
| dfs_pwm | Probability-weighted moment frontier estimator |
| green | American electric utility companies |
| kern_smooth | Frontier estimation via kernel smoothing |
| kern_smooth_bw | Bandwidth selection for kernel smoothing frontier estimators |
| kopt_momt_pick | Optimal k in moment and Pickands frontier estimators |
| loc_est | Local linear frontier estimator |
| loc_est_bw | Bandwidth selection for the local linear frontier estimator |
| loc_max | Local maximum frontier estimators |
| mopt_pwm | Threshold selection for the PWM frontier estimator |
| npbr | Nonparametric boundary regression |
| nuclear | Reliability programs of nuclear reactors |
| pick_est | Local Pickands' frontier estimator |
| poly_degree | AIC and BIC criteria for choosing the optimal degree of the polynomial frontier estimator |
| poly_est | Polynomial frontier estimators |
| post | European postal services |
| quad_spline_est | Quadratic spline frontiers |
| quad_spline_kn | AIC and BIC criteria for choosing the optimal number of inter-knot segments in quadratic spline fits |
| records | Annual sport records |
| rho_momt_pick | Optimal rho for moment and Pickands frontier estimator |
| rho_pwm | Probability-weighted moment frontier estimator |