This study measures the efficiencies incorporating waste generation using Japanese prefecture level data. We apply and compare several models using directional distance functions. There are wide variations in the efficiency scores between the two orientations, “input, desirable and undesirable...

This paper evaluates the production activities of Japanese airports from 1987-2005 by using the directional slacks-based Inefficiency Data Envelopment Analysis model. Three measures of efficiency are estimated: the SBI-directional slacks-based inefficiency measure, the directional distance...

This study intends to understand how disaster is related to countries' production efficiency using a sample of 137 countries over 1980 - 2011. We analyze the effect of the number of man-made and natural disaster occurrences on countries' technological change (swift of the frontier) and...

This paper analyzes productivity with a directional distance function model by investigating convexity and non-convexity in the Chinese banking sector. Two primary findings are summarized. First, there is a distinct change in productivity between large versus small banks and public versus...