Productivity Issues in Services at the Micro Level: A Special Issue of the Journal of Productivity Analysis

7 take advantage of the panel structure of their data to control for possible errors of specification in their models. It is interesting to note that the econometric and DEA methods may be closer than some of their respective advocates seem to believe. Several of the studies show that the former as well as the latter can be effectively used to assess the relative effi­ ciency of groups of firms or individual firms, and one of them explicitly compare results arising from both (Fecher et al.)...