title: The ecological fallacy.
authors.affiliation: Biometry Branch, Division of Cancer Prevention and Control, NCI, NIH, Bethesda, MD.
authors.forename: S
authors.initials: S
authors.lastname: Piantadosi
authors.forename: D P
authors.initials: DP
authors.lastname: Byar
authors.forename: S B
authors.initials: SB
authors.lastname: Green
mesh_terms: D004463:Ecology; D004812:Epidemiologic Methods; D006801:Humans; D013223:Statistics as Topic