How Non-radiality Matters – Pareto-koopmans Technical Efficiency in Production of Branches of a Slovak Commercial Bank

The purpose of the paper is to point to usability of data envelopment analysis (DEA) for technical efficiency assessment of bank branches. The paper addresses the issue of choosing a technical efficiency measure most comprehensive and informative and makes a comparison between the Pareto-Koopmans measure and the hyperbolic Debreu-Farrell measure. By way of both theoretical argumentation and empirical demonstration, the paper shows that technical efficiency measurement in DEA should be based on non-radial measures rather than radial measures that are conventionally used in DEA applications. In addition, the paper justifies the choice of a specific DEA model suitable for technical efficiency measurement of bank branches.