Nathan Keyfitz FRSC FRSS (June 29, 1913 – April 6, 2010) was a Canadian demographer, a pioneer of mathematical demography.
[1][2][4] He worked for the Dominion Bureau of Statistics in Canada from 1936 to 1959, meanwhile earning a Ph.D. in sociology from the University of Chicago in 1952.
He retired from Harvard in 1981, only to take another faculty position at Ohio State University and then to direct the Population Program at the International Institute for Applied Systems Analysis in Austria from 1983 to 1993.
[2] Keyfitz was a fellow of the Royal Society of Canada, the Royal Statistical Society, the American Statistical Association, and the American Academy of Arts and Sciences, and a member of the U.S. National Academy of Sciences.
[6] In June 2013, a symposium on mathematical demography was held in honor of the centennial of his birth.