John W. Pratt

John W. Pratt
Born	1931 (age 85–86)
Institutions	Harvard University
Alma mater	Stanford University
Thesis	Some Results in the Decision Theory of One-Parameter Multivariate Polya-Type Distributions (1956)
Doctoral advisor	Samuel Karlin
Doctoral students	Michael R. Powers

John Winsor Pratt (born 1931) is Emeritus William Ziegler professor business administration at Harvard University. 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.

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