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Xavier Gabaix
Summary
Xavier Gabaix (born August 1971) is a French economist, currently the Pershing Square Professor of Economics and Finance at Harvard University. He has been listed among the top 8 young economists in the world by The Economist. He holds a B.A. in Mathematics from the Ecole Normale Supérieure, as well as a Ph.D. in Economics from Harvard University.
Gabaix mostly researches asset pricing, behavioral economics, and macroeconomics. He has many notable and highly original research contributions on a number of subjects in financial economics, including the level of compensation of corporate executives, and behaviorally influenced decision making and its influence on asset market behaviour. In some of his work, he has made use of axiom-based models of the shapes of the tails of probability distributions. A hallmark of Professor Gabaix's research style is his propensity to take unexpected directions. He previously held a position as Associate Professor of Economics at the Massachusetts Institute of Technology.
Gabaix continues to work on bounded rationality. His paper A Behavioral New Keynesian Model was called "the most interesting macroeconomic theory paper in years" by Bloomberg View in an article titled Answering The Hardest Question In Economics. The article goes on to suggest that the work "heralds a sea change in the way macroeconomic theory gets done."
Gabaix, along with Ralph Koijen, the AQR Capital Management Distinguished Service Professor of Finance and Fama Faculty Fellow at the University of Chicago, demonstrates that markets are not “elastic”, as textbooks say they should be.
According to The Economist, "The paper will surprise the typical economist, who, according to the authors’ surveys, believes that flows do not affect prices. It also threatens associated financial theories. One is the Modigliani-Miller theorem, which says that it does not matter whether a company finances itself with equity or with debt. In inelastic markets, by contrast, a firm that issues debt to buy back its stock will find that it drives up both its own share price and the broader market.
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