1. Introduction: why natural experiments? Part I. Discovering Natural Experiments: 2. Standard natural experiments 3. Regression-discontinuity designs 4. Instrumental-variables designs Part II. Analyzing Natural Experiments: 5. Simplicity and transparency: keys to quantitative analysis 6. Sampling processes and standard errors 7. The central role of qualitative evidence Part III. Evaluating Natural Experiments: 8. How plausible is as-if random? 9. How credible is the model? 10. How relevant is the intervention? Part IV. Conclusion: 11. Building strong research designs through multi-method research.
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