title: Identifiability, exchangeability and confounding revisited.
abstract: 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.
authors.affiliation: Department of Epidemiology and Department of Statistics, University of California, Los Angeles, CA 90095-1772, USA. lesdomes@ucla.edu
authors.forename: Sander
authors.initials: S
authors.lastname: Greenland
authors.forename: James M
authors.initials: JM
authors.lastname: Robins