Thanassoulis, Emmanuel; Kortelainen, Mika; Allen, Rachel - In: European Journal of Operational Research 218 (2012) 1, pp. 175-185
In a Data Envelopment Analysis model, some of the weights used to compute the efficiency of a unit can have zero or negligible value despite of the importance of the corresponding input or output. This paper offers an approach to preventing inputs and outputs from being ignored in the DEA...