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1. GENERAL DISCUSSION 1 1.1 Introduction 1 1.2 Single Input and Single Output 2 1.3 Two Inputs and One Output Case 6 1.4 One Input and Two Outputs Case 8 1.5 Fixed and Variable Weights 12 1.6 Summary and Conclusion 13 1.7 Problem Supplement for Chapter 1 15 2. BASIC CCR MODEL 21 2.1 Introduction 21 2.2 Data 22 2.3 The CCR Model 23 2.4 From a Fractional to a Linear Program 23 2.5 Meaning of Optimal Weights 25 2.6 Explanatory Examples 25 2.6.1 Example 2.1 (1 Input and 1 Output Case) 26 2.6.2 Example 2.2 (2 Inputs and 1 Output Case) 27 2.7 illustration of Example 2.2 30 2.8 Summary of Chapter 2 32 2.9 Selected Bibliography 33 2.10 Problem Supplement for Chapter 2 34 3. CCR MODEL AND PRODUCTION CORRESPONDENCE 41 3.1 Introduction 41 3.2 Production Possibility Set 42 3.3 The CCR Model and Dual Problem 43 3.4 The Reference Set and Improvement in Efficiency 47 vii 3.5 Theorems on CCR-Efficiency 48 3.6 Computational Aspects of the CCR Model 50 3.6.1 Computational Procedure for the CCR Model 50 3.6.2 Data Envelopment Analysis and the Data 52 3.6.3 Determination of Weights (=Multipliers) 52 3.6.4 Reasons for Solving the CCR Model Using the Envelopment Form 52 3.7 Example 53 3.8 The Output-Oriented Model 58 3.9 Discretionary and Non-Discretionary Inputs 60 3.10 Summary of Chapter 3 64 3.11 Notes and Selected Bibliography 65 3.12 Related DEA-Solver Models for Chapter 3 67 3.13 Problem Supplement for Chapter 3 68 4. ALTERNATIVE DEA MODELS 83 4.1 introduction 83 4.2 The BCC Models 85 4.2.1 The BCC Model 87 4.2.2 The Output-oriented BCC Model 89 4.3 The Additive Model 90 4.3.1 The Basic Additive Model 90 4.3.2 Translation Invariance of the Additive Model 93 4.4 A Slacks-Based Measure of Efficiency (SBM) 95 4.4.1 Definition of SBM 96 4.4.2 Interpretation of SBM as a Product of Input and Output Inefficiencies 97 4.4.3 Solving SBM 97 4.4.4 SBM and the CCR Measure 99 4.4.5 The Dual Program of the SBM Model 100 4.4.6 Oriented SBM Models 101 4.4.7 A Weighted SBM Model 101 4.4.8 Numerical Example (SBM) 102 4.5 Russell Measure Models 102 4.6 Summary of the Basic DEA Models 104 4.7 Summary of Chapter 4 106 4.8 Notes and Selected Bibliography 107 4.9 Appendix: Free Disposal Hull (FDH) Models 107 4.10 Related DEA-Solver Models for Chapter 4 109 4.11 Problem Supplement for Chapter 4 110 5. RETURNS TO SCALE 119 5.1 Introduction 119 5.2 Geometric Portrayals in DEA 122 5.3 BCC Returns to Scale 124 5.4 CCR Returns to Scale 126 5.5 Most Productive Scale Size 131 5.6 Further Considerations 135 5.7 Relaxation of the Convexity Condition 138 5.8 Decomposition of Technical Efficiency 140 5.8.1 Scale Efficiency 140 5.3.2 Mix Efficiency 142 5.8.3 An Example of Decomposition of Technical Efficiency 143 5.9 An Example of Returns to Scale Using a Bank Merger Simulation 144 5.9.1 Background 144 5.9.2 Efficiencies and Returns to Scale 144 5.9.3 The Effects of a Merger 147 5.10 Summary 150 5.11 Additive Models 150 5.12 Multiplicative Models and "Exact" Elasticity 153 5.13 Summary of Chapter 5 158 5.14 Appendix: FGL Treatment and Extensions 159 5.15 Related DEA-Solver Models for Chapter 5 160 5.16 Problem Supplement for Chapter 5 161 6. MODELS WITH RESTRICTED MULTIPLIERS 165 6.1 Introduction 165 6.2 Assurance Region Method 166 6.2.1 Formula for the Assurance Region Method 166 6.2.2 General Hospital Example 169 6.2.3 Change of Efficient Frontier by Assurance Region Method 171 6.2.4 On Determining the Lower and Upper Bounds 172 6.3 Another Assurance Region Model 173 6.4 Cone-Ratio Method 174 6.4.1 Polyhedral Convex Cone as an Admissible Region of Weights 174 6.4.2 Formula for Cone-Ratio Method 175 6.4.3 A Cone-Ratio Example 176 6.4.4 How to Choose Admissible Directions 177 6.5 An Application of the Cone-Ratio Model 177 6.6 Negative Slack Values and Their Uses 182 6.7 A Site Evaluation Study for Relocating Japanese Government Agencies out of Tokyo 184 6.7.1 Background 184 6.7.2 The Main Criteria and their Hierarchy Structure 185 6.7.3 Scores of the 10 Sites with respect to the 18 Criteria 186 6.7.4 Weights of the 18 Criteria by the 18 Council Members (Evaluators) 187 6.7.5 Decision Analyses using Averages and Medians 189 6.7.6 Decision Analyses using the Assurance Region Model 189 6.7.7 Evaluation of "Positive" of Each Site 190 6.7.8 Evaluation of "Negative" of Each Site 190 6.7.9 Uses of "Positive" and "Negative" Scores 191 6.7.10 Decision by the Council 191 6.7.11 Concluding Remarks 192 6.8 Summary of Chapter 6 193 6.9 Notes and Selected Bibliography 194 6.10 Related DEA-Solver Models for Chapter 6 194 6.11 Problem Supplement for Chapter 6 195 7. NON-DISCRETIONARY AND CATEGORICAL VARIABLES 203 7.1 Introduction 203 7.2 Examples 205 7.3 Non-controllable, Non-discretionary and Bounded Variable Models 207 7.3.1 Non-controllable Variable (NCN) Model 207 7.3.2 An Example of a Non-Controllable Variable 208 7.3.3 Non-discretionary Variable (NDSC) Model 210 7.3.4 Bounded Variable (BND) Model 212 7.3.5 An Example of the Bounded Variable Model 212 7.4 DEA with Categorical DMUs 215 7.4.1 An Example of a Hierarchical Category 215 7.4.2 Solution to the Categorical Model 216 7.4.3 Extension of the Categorical Model 217 7.5 Comparisons of Efficiency between Different Systems 219 7.5.1 Formulation 219 7.5.2 Computation of Efficiency 220 7.5.3 Illustration of a One Input and Two Output Scenario 220 7.6 Rank-Sum Statistics and DEA 221 7.6.1 Rank-Sum-Test (Wilcoxon-Mann-Whitney) 222 7.6.2 Use of the Test for Comparing the DEA Scores of Two Groups 223 7.6.3 Use of the Test for Comparing the Efficient Frontiers of Two Groups 224 7.6.4 Bilateral Comparisons Using DEA 224 7.6.5 An Example of Bilateral Comparisons in DEA 225 7.6.6 Evaluating Efficiencies of Different Organization Forms 226 7.7 Summary of Chapter 7 228 7.8 Notes and Selected Bibliography 228 7.9 Related DEA-Solver Models for Chapter 7 228 7.10 Problem Supplement for Chapter 7 230 8. ALLOCATION MODELS 245 8.1 Introduction 245 8.2 Overall Efficiency with Common Prices and Costs 246 8.2.1 Cost Efficiency 246 8.2.2 Revenue Efficiency 248 8.2.3 Profit Efficiency 248 8.2.4 An Example 249 8.3 New Cost Efficiency under Different Unit Prices 250 8.3.1 A New Scheme for Evaluating Cost Efficiency 250 8.3.2 Differences Between the Two Models 252 8.3.3 An Empirical Example 253 8.3.4 Extensions 255 8.4 Decomposition of Cost Efficiency 257 8.4.1 Loss due to Technical Inefficiency 257 8.4.2 Loss due to Input Price Inefficiency 258 8.4.3 Loss due to Allocative Inefficiency 259 8.4.4 Decomposition of the Actual Cost 259 8.4.5 An Example of Decomposition of Actual Cost 260 8.5 Summary of Chapter 8 260 8.6 Notes and Selected Bibliography 261 8.7 Related DEA-Solver Models for Chapter 8 262 8.8 Problem Supplement for Chapter 8 264 9. DATA VARIATIONS 271 9.1 Introduction 271 9.2 Sensitivity Analysis 271 9.2.1 Degrees of Freedom 271 9.2.2 Algorithmic Approaches 272 9.2.3 Metric Approaches 272 9.2.4 Multiplier Model Approaches 275 9.3 Statistical Approaches 279 9.4 Chance-Constrained Programming and Satisficing in DEA 286 9.4.1 Introduction 286 9.4.2 Satisficing in DEA 286 9.4.3 Deterministic Equivalents 287 9.4.4 Stochastic Efficiency 290 9.5 Window Analysis 292 9.5.1 An Example 292 9.5.2 Application 293 9.5.3 Analysis 295 9.6 Summary of Chapter 9 296 9.7 Related DEA-Solver Models for Chapter 9 297 10. SUPER-EFFICIENCY MODELS 301 10.1 Introduction 301 10.2 Radial Super-efficiency Models 302 10.3 Non-radial Super-efficiency Models 305 10.3.1 Definition of Non-radial Super-efficiency Measure 306 10.3.2 Solving Super-efficiency 307 10.3.3 Input/Output-Oriented Super-efficiency 308 10.3.4 An Example of Non-radial Super-efficiency 308 10.4 Extensions to Variable Returns-to-Scale 309 10.4.1 Radial Super-efficiency Case 309 10.4.2 Non-radial Super-efficiency Case 310 10.5 Summary of Chapter 10 311 10.6 Notes and Selected Bibliography 311 10.7 Related DEA-Solver Models for Chapter 10 311 10.8 Problem Supplement for Chapter 10 312 Appendices A-Linear Programming and Duality 315 6.2 Efficiency and Weight of 14 Hospitals by CCR Model 170 6.3 Efficiency and Weight of 14 Hospitals with Assurance Region Method 170 6.4 Efficiency of 14 Hospitals by CR (Cone-Ratio) and CCR Mod- els 176 6.5 Number of Bank Failures (through 10-31-88) 179 6.6 Inputs and Outputs 180 6.7 CCR and Cone-Ratio Efficiency Scores (1984, 1985)* 181 6.8 Printout for Cone-Ratio CCR Model - Interstate Bank of Fort Worth, 1985. 183 6.9 Scores (Si) of 10 Sites (A-J) with respect to 18 Criteria (Cl- C18) 186 6.10 Statistics of Weights assigned the 18 Criteria (C1-C18) by 18 Council Members 188 6.11 Averages and Medians of Scores of the 10 Sites 189 7.1 Data for Public Libraries in Tokyo 208 7.2 Efficiency of Libraries by CCR and NCN 209 7.3 Data of 12 Japanese Baseball Teams in 1993 213 7.4 Projection of Attendance by CCR and Bounded Models 214 7.5 Categorization of Libraries 216 7.6 Nine DMUs with Three Category Levels 218 7.7 Comparisons of Stores in Two Systems 222 7.8 Comparisons of Two Systems 222 7.9 Example of Bilateral Comparisons 226 8.1 Sample Data for Allocative Efficiency 249 8.2 Efficiencies 249 8.3 Comparison of Traditional and New Scheme 253 8.4 Data for 12 Hospitals 254 8.5 New Data Set and Efficiencies 254 8.6 Decomposition of Actual Cost 260 9.1 Data for a Sensitivity Analysis 277 9.2 Initial Solutions 278 9.3 Results of 5% Data Variations 278 9.4 OLS Regression Estimates without Dummy Variables 282 9.5 Stochastic Frontier Regression Estimates without Dummy Vari- ables 283 9.6 OLS Regression Estimates without Dummy Variables on DEA- efficient DMUs 284 9.7 Stochastic Frontier Regression Estimates without Dummy Vari- ables on DEA-efficient DMUs 285 9.8 Window Analysis: 56 DMUs in U.S. Army Recruitment Bat- talions 3 Outputs - 10 Inputs 294 10.1 Test Data 303 10.2 Andersen-Petersen Ranking* 304 10.3 Non-radial Super-efficiency 309 10.4 Data for Super-efficiency 312 10.5 Super-efficiency Scores under Variable RTS 313 10.6 Super-efficiency Scores under Constant RTS 313 A.1 Symmetric Primal-Dual Problem 319 A.2 General Form of Duality Relation 324 B.1 Window Analysis by Three Adjacent Years 339 B.2 Headings to Inputs/Outputs 342