Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Measuring the total return variation explained by shocks to expected cash flows, time-varying expected returns, and shocks to expected returns is one way to judge the rationality of stock prices. Variables that proxy for expected returns and expected-return shocks capture 30 percent of the variance of annual NYSE value-weighted returns. Growth rates of production, used to proxy for shocks to expected cash flows, explain 43 percent of the return variance. Whether the combined explanatory power of the variables--about 58 percent of the variance of annual returns--is good or bad news about market efficiency is left for the reader to judge. Copyright 1990 by American Finance Association.