hiller studied at Kalamazoo College and the University of Michigan where he received his B.A. degree in 1967.[10] He received the S.M. degree from the Massachusetts Institute of Technology (MIT) in 1968, and his Ph.D. from MIT in 1972 with thesis entitled Rational expectations and the structure of interest rates under the supervision of Franco Modigliani.[2] He has taught at Yale since 1982 and previously held faculty positions at the Wharton School of the University of Pennsylvania and the University of Minnesota, also giving frequent lectures at the London School of Economics. He has written on economic topics that range from behavioral finance to real estate to risk management, and has been co-organizer of NBER workshops on behavioral finance with Richard Thaler since 1991. His book Macro Markets won TIAA-CREF's first annual Paul A. Samuelson Award. He currently publishes a syndicated column.
In 1981 Shiller published an article in The American Economic Review titled "Do stock prices move too much to be justified by subsequent changes in dividends?"[11] in which he challenged the efficient-market hypothesis, which was the dominant view in the economics profession at the time. Shiller argued that in a rational stock market, investors would base stock prices on the expected receipt of future dividends, discounted to a present value. He examined the performance of the U.S. stock market since the 1920s, and considered the kinds of expectations of future dividends and discount rates that could justify the wide range of variation experienced in the stock market. Shiller concluded that the volatility of the stock market was greater than could plausibly be explained by any rational view of the future.
The behavioral finance school gained new credibility following the October 1987 stock market crash. Shiller's work included survey research that asked investors and stock traders what motivated them to make trades; the results further bolstered his hypothesis that these decisions are often driven by emotion instead of rational calculation. Much of this survey data has been gathered continuously since 1989