The data the model was introduced on | A technology with a known answer | Radial efficiency | Slacks-based efficiency | Directional distance | Productivity over time | Scale | The part most DEA analyses leave out | How fast can any of this converge? | Ranking the units that tied | When prices are known | The weights themselves

Load Package | Which panel model? An overview of psfm() | Generalized True Random Effects Model | Which estimator: "fiml" or "sml" | GTRE Results | When one of the persistent scales comes back as zero | Extracting results: standard R modeling generics | Heteroskedastic inefficiency: the pipe formula and GTRE_Z | Parametric bootstrap for inference: psfm_bootstrap() | Practical tips