Krivonozhko, Vladimir; R. Førsund, Finn; V. Lychev, Andrey - Økonomisk institutt, Universitetet i Oslo - 2011
A new DEA model has been introduced recently combining the primal and the dual models in order to impose strong complementary slackness conditions. It was claimed that a reference set that contains the maximum number of efficient units can then be determined. The model is very interesting as a...