... Orientated DEA Models, mimeo, Centre for Efficiency and Productivity Analysis, University of New England, Armidale Coelli, T.J and S Perelman (1996), “A Comparison of Parametric and Non-parametric Distance ... Version 2.1: A Data Envelopment Analysis (Computer) Program by Tim Coelli Centre for Efficiency and Productivity Analysis Department of Econometrics University of New England Armidale, NSW, 2351 Australia ... A., W.W Cooper, J Rousseau and J Semple (1987), “Data Envelopment Analysis and Axiomatic Notions of Efficiency and Reference Sets”, Research Report CCS 558, Centre for Cybernetic Studies, The...