Seiford LM and J Zhu (2005). “Notes on Sensitivity and Stability of the Classifications of Returns to Scale in Data Envelopment Analysis: A Comment.” JPA 23(3): 315-316.

Seiford LM and J Zhu (2005). “Notes on Sensitivity and Stability of the Classifications of Returns to Scale in Data Envelopment Analysis: A Comment.” JPA 23(3): 315-316.

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