Abstract :
[en] Most of the literature on the efficiency effects of regulatory reforms ignores
the gradual nature of the implementation of these reforms. This article
describes a new simple data manipulation that minimizes data requirements
to measure econometrically the impact on efficiency of each stage of
multi-stages regulatory reforms. The approach can easily be implemented
using standard stochastic frontier software programs. It is illustrated with
data on the Spanish port system, which went through a two-stage reform
during the 1990s.
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