Impact evaluation in practice

Cover -- Half Title -- Title Page -- Copyright Page -- Contents -- Preface -- Acknowledgments -- About the Authors -- Abbreviations -- PART ONE. INTRODUCTION TO IMPACT EVALUATION -- Chapter 1. Why Evaluate? -- Evidence-Based Policy Making -- What Is Impact Evaluation? -- Prospective versus Retrospective Impact Evaluation -- Efficacy Studies and Effectiveness Studies -- Complementary Approaches -- Ethical Considerations Regarding Impact Evaluation -- Impact Evaluation for Policy Decisions -- Deciding Whether to Carry Out an Impact Evaluation -- Chapter 2. Preparing for an Evaluation