The 1854 cholera outbreak is the example of a natural experiment discussed often by David A. Freedman（英語版）, e.g. in Statistical Models: Theory and Practice (Cambridge University Press) [1], chapter 1.3 (pp. 6–9).
Cook, L. M.; Turner, J. R. G. (2008). “Decline of melanism in two British moths: spatial, temporal and inter-specific variation”. Heredity101 (6): 483–489. doi:10.1038/hdy.2008.105. PMID18941471.
Angrist, Joshua D. (1990). “Lifetime Earnings and the Vietnam Draft Lottery: Evidence from Social Security Administrative Records”. American Economic Review80 (3): 313–336. JSTOR2006669.
Cook, L. M.; Turner, J. R. G. (2008). “Decline of melanism in two British moths: spatial, temporal and inter-specific variation”. Heredity101 (6): 483–489. doi:10.1038/hdy.2008.105. PMID18941471.
The 1854 cholera outbreak is the example of a natural experiment discussed often by David A. Freedman（英語版）, e.g. in Statistical Models: Theory and Practice (Cambridge University Press) [1], chapter 1.3 (pp. 6–9).
