Karagiannis, G.; Midmore, P.; Tzouvelekas, V. - In: Journal of Productivity Analysis 18 (2002) 1, pp. 23-38
This paper proposes an alternative model for separating technical change from time-varying technical inefficiency. The proposed formulation uses the general index, developed by Baltagi and Griffin (1988), to model technical change in the production frontier function and a quadratic function of...