Methodology.- The Measurement of Efficiency.- Statistical Inference in Nonparametric Frontier Estimation.- Nonparametric Robust Estimators: Partial Frontiers.- Conditional Measures Of Efficiency.- Applications.- Economies of Scale, Scope and Experience in the Italian Motor-Vehicle Sector.- Age, Scale and Concentration Effects in a Public Research System.- Exploring the Effects of Manager Tenure, Fund Age and their Interaction.- Conclusions.