Joel E. Cohen
Head, Laboratory of Populations
Applied Mathematics, Harvard University, 1970; Dr. P.H., Population Sciences
and Tropical Public Health, Harvard University, 1973.
His additional research includes analysis of the food web associated with rice fields in the Philippines, with interest in larger questions about food web structure and improvements in biological control. His recent mathematical work, on relative entropy, nonnegative stochastic matrices, and nonlinear mappings, directly connects with issues raised by his work with populations.
Cohen's publications include Comparisons of Stochastic Matrices, with Applications in Information Theory, Statistics, Economics and Population Sciences (1998, with J.H.B. Kemperman and Gh. Zbaganu); How Many People Can the Earth Support? (1995); Absolute Zero Gravity (1992, with B. Devine); Community Food Webs: Data and Theory (1990, with F. Briand and C.M. Newman); and Food Webs and Niche Space (1978).