The Gini Index is the most common measure of wealth distribution within nations

Why do Major League Baseball games take so long to play these days? Because the Oakland A's found that the best way to produce runs is to draw a lot of walks. So baseball became a game of hitters waiting out pitchers.

Charles Wheelan's new book "Naked Statistics" has fun with the serious subject of stats.

Author Nate Silver discusses why he believes that numbers are part of the challenge in painting a clear picture of the American economy.