In this note we show, by means of several examples, that a directional distance function model cannot be matched with an additive model. Specifically, we show the difference between the directional slacks-based measure and the corresponding directional distance function.

Over the last twenty years an increasing number of studies have relied on the standard definition of the Malmquist-Luenberger index proposed by Chung et al. (1997) [J. Environ. Manage., 51, 229-240], to assess environmental sensitive productivity change. While recent contributions have shown...

This paper proposes two new Luenberger-type indicators, one for measuring productivity change of decision making units in the full input-output space, and the other one for determining profit inefficiency change over time when information on market prices is also available. Both approaches are...

In this paper we describe a Shiny interactive Web application (RStudio, Inc, 2014) by RStudio (RStudio Team, 2012) which is used to estimate technical efficiency through Data Envelopment Analysis (DEA), a technique widely used by engineers and operation research practitioners. The Shiny...