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RICHTER--Marcel Kessel (Ket), University of Minnesota professor of economics, died July 11, 2014. Born in New York, NY in 1932; raised in Leonia, NJ; and graduated from Birch Wathen School, Swarthmore College, and MIT. Marcel used mathematical logic and set theory to develop methods for understanding fundamental questions of consumer preference, rationality, choice, coalition formation, competition, and equilibrium. His seminal work on revealed preference is widely used to analyze and predict behavior by rational agents. Preceded in death by his wife, Sheila Mills Richter, and parents, Maurice N. Richter and Brina H. Kessel Richter. Survived by daughters Cynthia Reis-Richter (Martha) and Leila Fiester (Reid); grandchildren Solea Fiester and Carlos Reis-Richter; and brothers Maurice N. Richter, Jr. and Wayne Richter (Anne White).

Published in The New York Times on July 20, 2014
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