Preface; Part I. Case Studies: 1. Surveys; 2. Definitions; Part II. Selecting Cases: 3. Overview of case selection; 4. Descriptive case studies; 5. Causal case studies; 6. Algorithms and samples; Part III. Analyzing Cases: 7. A typology of research designs; 8. Quantitative and qualitative modes of analysis; Part IV. Validity: 9. Internal validity; 10. External validity; Part V. Conclusions: 11. Tradeoffs; Part VI. References; Index. leírás elrejtése