Barnum D and J Gleason (2005). “Technical Efficiency Bias Caused by Intra-Input Aggregation in Data Envelopment Analysis.” Appl Econ Letters 12(13): 785-788.
Barnum D and J Gleason (2005). “Technical Efficiency Bias Caused by Intra-Input Aggregation in Data Envelopment Analysis.” Appl Econ Letters 12(13): 785-788.