Greenland, SanderRobins, James2010-11-052009Greenland, Sander, and James M. Robins. 2009. Identifiability, exchangeability and confounding revisited. Epidemiologic Perspectives & Innovations 6:4.1742-5573http://nrs.harvard.edu/urn-3:HUL.InstRepos:4526947In 1986 the International Journal of Epidemiology published "Identifiability, Exchangeability and Epidemiological Confounding". We review the article from the perspective of a quarter century after it was first drafted and relate it to subsequent developments on confounding, ignorability, and collapsibility.en-USJournal Article2010-11-0510.1186/1742-5573-6-4