There is one central fact about the economic history of the twentieth century: above all, the century just past has been the century of increasing material wealth and economic productivity. No previous era and no previous economy has seen material wealth and productive potential grow at such a...

For more than a century, diversified long-horizon investments in America's stock market have consistently received much higher returns than investors in bonds: a return gap averaging 6 percent per year. An enormous amount of creative and ingenious work by a great many economists has gone into...