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@article{ González2009,
 title = {Tracking the stepwise effects of regulatory reforms over time: a “back-door” approach},
 author = {González, María Manuela and Perelman, Sergio and Trujillo, Lourdes},
 journal = {Applied Economics},
 number = {2},
 pages = {211-218},
 volume = {41},
 year = {2009},
 doi = {https://doi.org/10.1080/00036840600994294},
 urn = {https://nbn-resolving.org/urn:nbn:de:0168-ssoar-241661},
 abstract = {Most of the literature on the efficiency effects of regulatory reforms ignores the gradual nature of the implementation of these reforms. This paper describes a new simple data manipulation which 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.},
}