A B-convex production model for evaluating performance of firms

摘要: Abstract Some 30 years ago Charnes, Cooper and Rhodes [A. W.W. Cooper, E. Rhodes, Measuring the efficiency of decision making units, European J. Oper. Res. 2 (6) (1978) 429–444] proposed DEA (Data Envelopement Analysis) as a mean measuring evaluating performance firms. This paper proposes model for production technologies which differs from traditional model. The usual convex framework is replaced by an order theoretical condition: if two input vectors can produce given output then maximum coordinatewise these that same output. In this model, are dually linked min–max cost function dual to Shephard's distance function. Assuming free disposal outputs be completely described in closed form.