of them with advantages but also shortcomings and caveats. The objectivity demanded for
policy-making and regulation of utilities leads many researchers to build their analyses over
the so-called Benefit-of-Doubt (BoD), which, in turn, results from the well-known Data
Envelopment Analysis (DEA). In a compensatory manner, these models construct piecewise
linear frontiers containing the benchmarks, but they disregard increasing marginal products …