Ebook: Natural experiments in the social sciences: a design-based approach

Why natural experiments? -- Standard natural experiments -- Regression-discontinuity designs -- Instrumental-variables designs -- Simplicity and transparency: keys to quantitative analysis -- Estimating variability: sampling processes and standard errors -- The central role of qualitative evidence -- How plausible is as-if random? -- How credible is the model? -- How relevant is the intervention? -- Building strong research designs through multi-method.