Kristof De Witte is professor at the Faculty of Economics and Business at KU Leuven and holds the chair in Effectiveness and Efficiency of Educational Innovations at United Nations University (UNU-MERIT) at Maastricht University.

• Introduction Chapter 1: Systematic Reviews in Education Research: When Do Effect Studies Provide Evidence? 1. Introduction 2. First order conditions 3. Second order conditions 4. Third order conditions 5. Applying the inclusion criteria in practice 6. Concluding remarks Appendix A. Inclusion criteria used in review articles in the Review of Education, edition 2010 Chapter 2: Selection Bias in Educational Issues and the Use of Heckman's Sample Selection Model 1. Introduction 2. Selection bias and causality 3. Heckman's sample selection model 4. The sample selection model in educational research 5. Conclusion Chapter 3: The Causal Effect of Single-Sex Education versus Coeducation on Motivation and Educational Attainments. Evidence from a Randomized Experiment in Secondary Education 1. Introduction 2. Literature review 3. Flemish education system 4. Data and experiment 5. Quantitative analysis 6. Qualitative analysis 7. Conclusion and policy recommendations Chapter 4: Benchmarking and Operational Management: an Application of Frontier Analysis to Dutch Secondary Education 1. Introduction 2. Methodology 3. Data 4. Results 5. Conclusions Chapter 5: Schools' Efficiency and Equity: Evidence from a Stochastic Frontier Approach with Translog Specification 1. Introduction 2. Methodology and data 3. Results and discussion Appendix A Chapter 6: Do Nurses React to Inter-Industry Wage Differentials? -; Evidence of Nursing Graduates in the Netherlands 1. Introduction 2. Wage differentials and job-related skills in the literature 3. The life sciences and health industry in the Netherlands 4. Conceptual framework 5. Empirical strategy 6. Data 7. Descriptive statistics 8. Results 9. Discussion and conclusions Short Author Bios of the Corresponding Authors