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%T Tracking the stepwise effects of regulatory reforms over time: a “back-door” approach %A González, María Manuela %A Perelman, Sergio %A Trujillo, Lourdes %J Applied Economics %N 2 %P 211-218 %V 41 %D 2009 %= 2011-05-11T15:25:00Z %~ http://www.peerproject.eu/ %> https://nbn-resolving.org/urn:nbn:de:0168-ssoar-241661 %X 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. %G en %9 journal article %W GESIS - http://www.gesis.org %~ SSOAR - http://www.ssoar.info