%0 Journal Article
%T Identifiability, exchangeability and confounding revisited
%A Greenland Sander
%A Robins James M
%J Epidemiologic Perspectives and Innovations
%D 2009
%I 
%R 10.1186/1742-5573-6-4
%X In 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.
%U http://www.epi-perspectives.com/content/6/1/4