F?re R, S Grosskopf and V Zelenyuk (2004). “Aggregation Bias and its Bounds in Measuring Technical Efficiency.” Appl Econ Letters 11(10): 657-660.
F?re R, S Grosskopf and V Zelenyuk (2004). “Aggregation Bias and its Bounds in Measuring Technical Efficiency.” Appl Econ Letters 11(10): 657-660.