Estimating Output-Specific Efficiencies

The present book is the offspring of my Habilitation, which is the key to academic tenure in Austria. Legal requirements demand that a Ha­ bilitation be published and so only seeing it in print marks the real end of this biographical landmark project. Fro

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Applied Optimization Volume 64 Series Editors:

Panos M. Pardalos University of Florida, U.S.A.

Donald Hearn University of Florida, U.S.A.

The titles published in this series are listed at the end of this volume.

Estimating Output-Specific Efficiencies by

Dieter Gstach Vienna University of Economics, Austria

SPRINGER-SCIENCE+BUSINESS MEDIA, B.V.

A C.I.P. Catalogue record for this book is available from the Library of Congress.

ISBN 978-1-4613-4883-2 ISBN 978-1-4615-0007-0 (eBook) DOI 10.1007/978-1-4615-0007-0

Printed on acid-free paper

AII Rights Reserved

© 2002 Springer Science+Business Media Dordrecht

Originally published by Kluwer Academic Publishers in 2002 Softcover reprint ofthe hardcover lst edition 2002 No part of the material protected by this copyright notice may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage and retrieval system, without written permission from the copyright owner

For Aurelia with love and gratitude

Contents

xi

Preface Acknowledgments

Part I

xiii

Motivating the concept 3

l. INTRODUCTION

1

Outline of the book

12

2

Related literature

17

3

Motivation

27

4

Geometrical illustration

30

5

Interpreting the difference

34

Part II

Operationalizing the concept

2. TECHNOLOGY ESTIMATION

41

1

Statistical structures underlying DEA

42

2

Output-ratios to characterize technology

44

3

DEA bias correction

54

vii

viii

ESTIMATING OUTPUT-SPECIFIC EFFICIENCIES

4

Estimator consistency

3. RELATION TO RADIAL MEASURES

60 63

1

Ouput-specific vs. radial efficiencies

64

2

An example that works

68

3

So why not use simple regression analysis ?

71

4

A counterexample

72

4. MARKOV CHAIN MONTE CARLO ANALYSIS

77

1

The Metropolis-Hastings algorithm

79

2

Single-component updates

80

3

Sampling from conjugate distributions

81

5. DATA GENERATING PROCESS

83

1

Target output ratios

83

2

Output specific efficiencies

84

3

Distribution of output vectors

86

6. IDENTIFICATION

89

1

The basic tradeoff in an expectational perspective

90

2

The role of domain observations

92

3

Likelihood surface

98

1- POSTERIOR DISTRIBUTIONS

109

1

The prior assumptions

109

2

Sampling

110

3

Scale Invariance

115

Contents

IX

Part III Evaluating the concept 8. ESTIMATOR PERFORMANCE

127

1

Sample generation

127

2

Case of DEA-estimated frontier

132

3

Case of known frontier

141

Part IV Putting the concept to work

9. AN APPLICATION

153

1

A brief review of related literature

154

2

Estimating technology

157

3

The statistical model

158

4

Constructing the Markov chains

163

5

Data

167

6

Results

172

7

Conclusions from the application

183

10. CONCLUDING REMARKS

187

1

Summary

187

2

Routes for future research

194

References

197

Preface

The present book is the offspring of my Habilitation, which is the key to academic tenure in Austria. Legal requirements demand that a Habilitation be published and so only seeing it in