"This well-documetned book gives intersting suggestions and provides a good synthesis of the mismatch theory, to whose development the author contributed. It will no doubt be useful to econometrists." European Review

• 1. Introduction.- 1.1. European Unemployment and the Mismatch Hypothesis.- 1.2. The Conceptual Framework followed in this Book.- 1.3. Overview and Results.- 2. Do Aggregate Measures of Mismatch Measure Mismatch? A Time Series Analysis of Existing Concepts.- 2.1. Introduction.- 2.2. Some Puzzling Evidence.- 2.3. Measuring Mismatch: Theoretical Foundations.- 2.4. Measurement Problems.- 2.5. Disaggregation and Unobserved Heterogeneity.- 2.6. Time Series Analysis.- 2.7. Testing for Unit Roots.- 2.8. On the Magnitude of Drifts in Macroeconomic Mismatch Time Series.- 2.9. Some Simulation Experiments.- 2.10. Concluding Remarks.- Appendix A2.- 3. Disaggregate Matching Functions, Spurious Mismatch and Occupational Reallocation in Germany.- 3.1. Introduction.- 3.2. Aggregate Matching Functions: Theoretical Framework.- 3.3. Aggregate Matching Functions in West Germany.- 3.4. Spurious Matching Functions.- 3.5. Disaggregate Matching Functions using a Panel of Occupational Groups.- 3.6. On Occupational Reallocation: Theoretical and Empirical Aspects.- 3.7. Understanding the Matching of Apprentices.- 3.8. Concluding Remarks.- Appendix A3.- 4. Matching and New Technologies: Does Unmeasured Ability Explain the Higher Wages of New-Technology Workers?.- 4.1. Introduction.- 4.2. Matching, Mobility, and Unmeasured Ability.- 4.3. The Micro Datasets: Presentation and Descriptive Analysis.- 4.4. Cross-Sectional Results.- 4.5. Wages and New Technologies: Evidence from Panel Data.- 4.6. Concluding Remarks.- Appendix A4.- 5. Conclusions.- 6. References.