Tohidi, Ghasem; Khodadadi, Maryam - In: Journal of industrial engineering international 9 (2013), pp. 1-6
The formulas of cost and allocative efficiencies of decision making units (DMUs) with positive data cannot be used for DMUs with negative data. On the other hand, these formulas are needed to analyze the productivity and performance of DMUs with negative data. To this end, this study introduces...