Tzanidakis G (1998). “Regression Versus Data Envelopment Analysis for Efficiency Measurement: An Application to the England and Wales Regulated Water Industry.” Utilities Policy 7: 75-85.

Tzanidakis G (1998). “Regression Versus Data Envelopment Analysis for Efficiency Measurement: An Application to the England and Wales Regulated Water Industry.” Utilities Policy 7: 75-85.

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