Gstach D (1995). “Comparing Structural Efficiency of Unbalanced Subsamples: A Resampling Adaptation of Data Envelopment Analysis.” Empirical Economics 20(3): 531.

Gstach D (1995). “Comparing Structural Efficiency of Unbalanced Subsamples: A Resampling Adaptation of Data Envelopment Analysis.” Empirical Economics 20(3): 531.

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