This paper introduces a new methodology ensuring units invariant slack selection in radial DEA models and incorporating the slacks into an overall efficiency score. The CCR and BCC models are units invariant in their radial component, but not in their slack component, thus changing the units of...

In a recent paper Bogetoft and Hougaard (1999) suggest the use of a new potential improvements approach to efficiency evaluation which has the advantage of separating the issue of benchmark selection from the issue of efficiency measurement. In the present paper the potential improvements...

This paper expands the banking efficiency literature by developing a banking intermediation model that captures both profit-maximising and corporate social responsibilities (CSRs) of banks. Using a dataset of 21 banks for each year 2006 to 2008, we evaluate the relative efficiency of Ghanaian...