Historically tested long-term strategies that always outperform the market

"O'Shaughnessy's conclusion that some strategies do produce consistently strong results while others underperform could shake up the investment business."
--Barron's

"What Works on Wall Street is indisputably a major contribution to empirical research on the behavior of common stocks in the United States. . . . Conceivably, the influence of What Works on Wall Street will prove immense."
--The Financial Analysts' Journal