COMPARISON OF RADIAL AND SBM DEA MODELS: EFFICIENCY EVALUATION OF COMPANIES SELLING SPORTS EQUIPMENT IN THE CZECH REPUBLIC

This paper deals with analysis and comparison between two groups of data envelopment analysis (DEA) models - traditional radial model with the assumption of constant returns to scale (CCR model) and slack-based measures of efficiency and super-efficiency (SBM model). These two models split decision making units into two subsets - efficient and inefficient. The second group can be easily ranked according to efficiency score of the units. The efficient units have identical efficiency scores and cannot be ranked directly. That is why this paper also aims to compare two important super-efficiency models derived from conventional CCR and SBM models - they are Andersen and Petersen model and SBM super-efficiency model. The results of all models are illustrated on a real data set - companies selling sports equipment and accessories in the Czech Republic. All calculations are realized using original procedures written in LINGO modelling language.