The Success EquationWhat role, exactly, do skill and luck play in our successes and failures? Some games, like roulette and the lottery, are pure luck. Others, like chess, exist at the other end of the spectrum, relying almost wholly on the skill of the players. But in every other domainfrom business, to investing, to sportsskill and luck seem almost hopelessly entangled. In his provocative new book, The Success Equation, Michael Mauboussin untangles the intricate