The ratio definition of efficiency has the form of a productivity measure. But the weights are endogenous variables and … they do not function as weights in a productivity index proper. It is shown that extended Farrell measures of efficiency … various projection points on the frontier.The Malmquist productivity index is the efficiency score for a unit in a period …

This paper investigates the forces driving output growth, namely technological, efficiency, and input changes, in 80 … efficiency levels, technological change, and the development of capital and labor elasticities. However, a consistent finding …

In this paper we study environmental efficiency within a pollution generating technology. Pollutants, or bads, are … environmental efficiency, and hence lower emissions, of three air pollutants. Furthermore, we suggest that treating biofuels as … entirely carbon neutral (as is common practice) may underestimate environmental efficiency scores and generate misleading …