DeYoung R (1997). “A Diagnostic Test for the Distribution-Free Efficiency Estimator: An Example Using U.S. Commercial Bank Data.” EJOR 98(2): 243-249.

DeYoung R (1997). “A Diagnostic Test for the Distribution-Free Efficiency Estimator: An Example Using U.S. Commercial Bank Data.” EJOR 98(2): 243-249.

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