Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Emmanuel Thanassoulis is active.

Publication


Featured researches published by Emmanuel Thanassoulis.


European Journal of Operational Research | 1991

Applied data envelopment analysis

A. Boussofiane; Robert G. Dyson; Emmanuel Thanassoulis

Abstract Data envelopment analysis (DEA) is a linear programming based technique for measuring the relative performance of organisational units where the presence of multiple inputs and outputs makes comparison difficult. This paper introduces the technique and focuses on some of the key issues that arise in applying DEA in practice.


Annals of Operations Research | 1997

Weights restrictions and value judgements in Data Envelopment Analysis: Evolution, development and future directions

Rachel Allen; Antreas D. Athanassopoulos; R. G. Dyson; Emmanuel Thanassoulis

This paper provides a review of the evolution, development and future research directions on the use of weights restrictions and value judgements in Data Envelopment Analysis. The paper argues that the incorporation of value judgements in DEA was motivated by applications of the method in real life organisations. The application driven development of the methods has led to a number of different approaches in the literature which have inevitably different uses and interpretations. The paper concentrates on the implications of weights restrictions on the efficiency, targets and peer comparators of inefficient Decision Making Units. The paper concludes with future research directions in the area of value judgements and weights restrictions.


Archive | 2001

Introduction to the theory and application of data envelopment analysis

Emmanuel Thanassoulis

Keywords: DAE ; PRODUCTIVITE Reference Record created on 2004-09-07, modified on 2016-08-08


European Journal of Operational Research | 1992

Estimating preferred target input-output levels using data envelopment analysis

Emmanuel Thanassoulis; Robert G. Dyson

Abstract This paper develops models which can be used to estimate alternative input-output target levels to render relatively inefficient organisational units efficient. The models can incorporate preferences over potential improvements to individual input output levels so that the resultant target levels reflect the users preferences over alternative paths to efficiency. The paper illustrates the practical usefulness of the models developed and highlights the alternative measures of relative efficiency implicit in the models developed.


Journal of the Operational Research Society | 2004

Negative data in DEA: A directional distance approach applied to bank branches

M.C.A. Silva Portela; Emmanuel Thanassoulis; Gary Simpson

This paper is drawn from the use of data envelopment analysis (DEA) in helping a Portuguese bank to manage the performance of its branches. The bank wanted to set targets for the branches on such variables as growth in number of clients, growth in funds deposited and so on. Such variables can take positive and negative values but apart from some exceptions, traditional DEA models have hitherto been restricted to non-negative data. We report on the development of a model to handle unrestricted data in a DEA framework and illustrate the use of this model on data from the bank concerned.


European Journal of Operational Research | 1995

Assessing police forces in England and Wales using data envelopment analysis

Emmanuel Thanassoulis

Abstract This paper reports on an assessment of police forces in England and Wales using Data Envelopment Analysis. The assessment contributed to a study of crime management carried out in 1993 by the Audit Commission, an independent body, set up by Act of Parliament to encourage the economic, effective and efficient provision of public services. The paper begins with a preliminary analysis of crime, crime clear up and manpower data to lead on to an initial assessment of performance. The assessment is then refined so that not only more confidence is gained in the results obtained but also performance on specific areas such as manning levels as distinct from crime clear ups is gained. The analysis reported helped the Audit Commission in their selection of good forces. Although the main focus of the paper is on the use of DEA on the policing context much of the approach used has wider application and the paper should prove of interest not only to those concerned with police performance but also to those using DEA more generally, in other contexts.


European Journal of Operational Research | 2000

The use of data envelopment analysis in the regulation of UK water utilities: Water distribution

Emmanuel Thanassoulis

Abstract Regulation is increasingly playing a major role in defence of the public interest in the UK and other economies, in the aftermath of the privatisation of utilities operating in near monopoly environments. This paper gives an account of the use of data envelopment analysis (DEA) by the regulator of water companies in England and Wales in 1994 in the context of setting price limits. DEA is a general purpose linear programming-based method for assessing the productive efficiencies of operating units such as bank branches or schools. The paper details the use of DEA to estimate potential savings in the specific context of water distribution and discusses the use of the results obtained. It also highlights certain generic issues arising in the use of DEA and more generally performance measurement methods in the regulatory context.


Omega-international Journal of Management Science | 1996

A comparison of data envelopment analysis and ratio analysis as tools for performance assessment

Emmanuel Thanassoulis; A. Boussofiane; Robert G. Dyson

This paper compares data envelopment analysis (DEA) and ratio analysis as alternative tools for assessing the performance of organisational units such as bank branches and schools. Such units typically use one or more resources to secure one or more outputs, the inputs and/or outputs being possibly incommensurate. The assessment of District Health Authorities in England on the provision of perinatal care is used as a vehicle for comparing the two methods. The comparison focuses on how well the two methods agree on the performance of a unit relative to that of other units, and on the estimates of targets each method provides for improving the performance of units. It is found that provided the performance indicators capture all variables used in the DEA assessment the two methods agree reasonably closely on the performance of the units as a whole, though this depends on the way the performance indicators are combined into a summary figure of performance. The two methods can disagree substantially on the relative performance of individual units. Ratio analysis, unlike DEA, is not found to be suitable for setting targets so that units can become more efficient. This is mainly due to the fact that DEA takes simultaneous account of all resources and outputs in assessing performance while ratio analysis relates only one resource to one output at a time. However, the two methods can support each other if used jointly. Ratios do provide useful information on the performance of a unit on specific aspects and they can support the communication of DEA results to non-specialists when the two methods agree on performance.


European Journal of Operational Research | 1995

Exploring output quality targets in the provision of perinatal care in England using data envelopment analysis

Emmanuel Thanassoulis; A. Boussofiane; Robert G. Dyson

Abstract This paper explores the use of Data Envelopment Analysis (DEA) to assess units providing perinatal care in England and estimate performance targets for them. DEA is a modelling methodology for deriving the relative efficiency of units where there are multiple incommensurate inputs and outputs. The paper proposes a plausible set of inputs and outputs for perinatal care in which the output set incorporates both activity levels and quality measures. The incorporation of quality measures into the input-output set leads to a requirement for extensions to the basic DEA models to allow for weight restrictions and varying preferences over potential improvements to different quality measures. The paper illustrates the use of such models using realistic data on perinatal care provision in England.


European Journal of Operational Research | 2000

DEA and its use in the regulation of water companies

Emmanuel Thanassoulis

Abstract This paper begins with an introduction to the basic principles of data envelopment analysis (DEA). DEA is a linear programming-based method for assessing the productive efficiencies of operating units such as bank branches, sales outlets, schools or individuals. This paper then goes on to describe the use of DEA in the regulatory framework. Regulation, employed to safeguard the public interest, is increasingly playing an major role in Great Britain and other countries in the aftermath of the privatisation of publicly owned companies including utilities which still enjoy a good degree of monopoly power. This paper gives an account of the use of DEA to estimate potential cost savings at water companies in the context of the price review conducted by the regulator of water companies in England and Wales in 1994. It also highlights certain generic issues arising in the use of DEA in the regulatory context. This paper should prove of interest both to those who want to know about DEA as a tool in general and to those interested in efficiency measurement under regulation.

Collaboration


Dive into the Emmanuel Thanassoulis's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Maria Portela

The Catholic University of America

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge