specializing in statistical inference whose career has been in the United States. Dempster obtained his BA and MA from U Toronto and his PhD (supervised by Tukey) from Princeton U in 1956. From 1958 to 2005 he was a faculty member at Harvard. In 1968 he introduced a generalization of Bayesian inference. In 1977 he was the senior author of the paper introducing the EM algorithm that dealt with the analysis of incomplete multivariate data. He was the IMS Neyman Lecturer in 1986 and the COPSS Fisher Lecturer in 1998.
http://www.stat.harvard.edu/faculty_page.php?page=dempster.html University website.