John Winsor Pratt (born 1931) is Emeritus William Ziegler professor business administration at Harvard University. His former education was conducted at Princeton and Stanford, where he specialized in mathematics and statistics. Pratt spent most of his academic career at Harvard University. He was an editor of the Journal of the American Statistical Association from 1965 to 1970. His researches on risk aversion, risk sharing incentives, and the nature and discovery of stochastic laws, statistical relationships that describe the effects of decisions. He has made contributions to research in risk aversion theory, notably with Kenneth Arrow on measures of risk aversion. In 1962 he was elected as a Fellow of the American Statistical Association. Publications Introduction to Statistical Decision Theory The Structure of Business Articles The Ghosh-Pratt theorem. Fair (and not so fair) Division How Many Balance Functions Does It Take To Determine A Utility Function? Efficient Risk Sharing: The Last Frontier. A New Interpretation of the F Statistic. Increasing Risk: Some Direct Constructions. Willingness to Pay and the Distribution of Risk and Wealth. The Contraction Mapping Approach to the Perron-Frobenius Theory: Why Hilbert's Metric? Evaluating and Comparing Projects: Simple Detection of False Alarms. Working Papers Some Neglected Axioms in Fair Division. Correlated Equilibrium and Nash Equilibrium as an Observer's Assessment of the Game. References 1931 births Harvard University faculty Living people Fellows of the American Statistical Association Fellows of the Econometric Society Fellows of the American Academy of Arts and Sciences