A Data Envelopment Analysis model for the joint determinations of efficiencies with variable returns to scale is developed. The model is applied to the study of the performace of individual specialities of National Health Services (NHS) trust in UK.

In this paper we analyse the ratings given in 1993 to the main Spanish banks, both private and governmental. We use 24 financial ratios obtained from the balance and the profit and loss accounts. Multidimensional scaling (MDS), a multivariate technique which is intuitive and robust to the data,...