This paper proposes an efficiency analysis of the major European incumbent firms in the fixed telecommunications sector. The non-parametric approach, that has been adopted here, expresses the efficiency according to a directional distance measure, allowing to consider the different nature of...

This paper discusses how a quality indicator can be constructed as a Luenberger indicator using directional distance functions. This leads to a suggested formula for aggregating individual soil quality attributes into an indicator. The method is illustrated using crop trials data from Western...

In this paper we take up the problem of positive, affine data translation within a Data Envelopment Analysis (DEA) framework.

This article studies the role of social capital on cotton production efficiency and productivity for a sample of small farms in Maharashtra, India using data envelopment analysis. Input shadow prices are computed as an indicator of the importance of social capital relative to other inputs....

Purpose – The purpose of this paper is to estimate the performance of 188 mutual funds relative to the risk/return frontier accounting for the transaction costs of producing a portfolio of investments. Design/methodology/approach – The directional output distance function is used to estimate...

The problem of infeasibility arises in conventional radial super-efficiency data envelopment analysis (DEA) models under variable returns to scale (VRS). To tackle this issue, a Nerlove–Luenberger (N–L) measure of super-efficiency is developed based on a directional distance function....