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Description in full Kenneth Joseph Arrow born Aug. 23, 1921, New York, N.Y., U.S. American economist known for his contributions to welfare economics and to general economic equilibrium theory. He was cowinner (with Sir John R. Hicks) of the Nobel Prize for Economics in 1972. Perhaps his most startling thesis (built on elementary mathematics) was the “impossibility theorem” (or “Arrow's theorem”), which holds that, under certain conditions of rationality and equality, it is impossible to guarantee that a ranking of societal preferences will correspond to rankings of individual preferences when more than two individuals and alternative choices are involved. In one of his earliest articles, published in 1951, Arrow showed that a competitive economy in equilibrium is efficient. Furthermore, he demonstrated that an efficient allocation could be reached if a government uses lump-sum taxes to transfer wealth and then lets the market work toward equilibrium. One implication of his findings is that, if a government chooses to redistribute income, it should do so directly rather than through price regulations that could hamper the free market. Arrow's early work on equilibrium still stands as one of the reasons many economists oppose price controls. After receiving his Ph.D. from Columbia University in 1951, Arrow taught at the University of Chicago (1948–49), at Stanford University (1949–68), and at Harvard University (1968–79). In 1979 he returned to Stanford University as Joan Kenney Professor of Economics and Professor of Operations Research. Arrow became professor emeritus at Stanford in 1991. Arrow received numerous honours and awards, including the John von Neumann Theory Prize (1986), for notable contributions to operations research and management science, and the National Medal of Science (2004), the highest scientific honour in the United States. He has also been a fellow of several academic societies, including the Econometric Society, the American Economic Association (AEA), the Institute of Mathematical Statistics, and the American Association for the Advancement of Science. Among Arrow's major publications are Social Choice and Individual Values (1951), Essays in the Theory of Risk Bearing (1971), and The Limits of Organization (1974). * Souce: Arrow, Kenneth J. (2013). Encyclopædia Britannica. Encyclopædia Britannica Ultimate Reference Suite. Chicago: Encyclopædia Britannica. Sharing Widget |