M. Glymour M, Weuve J, Berkman LF, Kawachi I, Robins JM. When is baseline adjustment useful in analyses of change? An example with education and cognitive change. Am J Epidemiol. 2005;162(3):267-78. doi:10.1093/aje/kwi187.

M. Glymour M, Berkman LF, Robins JM, Kawachi I. Does Childhood Schooling Affect Old Age Cognitive Function? Evidence from Natural Experiments. Harvard University; 2004.