Bai, Jennie; Philippon, Thomas; Savov, Alexi - Federal Reserve Bank of New York - 2012
have prices become more informative? Using stock and bond prices to forecast earnings, we find that the information content … of market prices has not increased since 1960. The magnitude of earnings surprises, however, has increased. A baseline … model predicts that as the efficiency of information production increases, prices become more disperse and covary more …