DEA for banks.

[Sancharee Chowdhury]

Hello everyone,
I want to study the efficiency of banks using Data Envelopment Analysis (DEA). When I run output-oriented DEA based on the variable return to scale I get CRS, VRS, NIRS and SCALE efficiency with their RTS. As I know if the value of the NIRS efficiency score is equal to the VRS efficiency score then decreasing return to scale exits. Otherwise increasing return to scale exits. Can anyone tell me how Stata calculates those RTS?

Thank you.

[Scott Merryman]

See:
https://www.stata-journal.com/articl...article=st0193

[Sancharee Chowdhury]

Thank you. I read this paper before but the output I found does not follow the way the paper described. According to the paper, the first bank of my result should operate on the decreasing return to scale as the value of the NIRS and VRS is equal but the result indicates that it operates on the increasing return to scale.