This paper provides several definitions of efficiency measures in the price space. Economic and scale aspects of inefficiency are considered to give empirical content to the measurement of efficiency when the production technology is described by cost functions models. It shows, in the...

As a result of the duality of cost and distance functions the efficiency of cost-minimizing behaviour can be compared to shadow-prizing behaviour, and conversely. In this framework we outline the form that dual efficiency measures, Muro (1982), Muro and Vera (1983), adopt for homothetic and...