Too Long; Didn't Read
We have known for over a century that worker productivity declines when the work week exceeds forty hours. Henry Ford was not a benevolent softy when he set this limit in 1914 — he knew this was the way to maximize profit. And that is what he did — profits doubled in the year following his move. <a href="http://www.nytimes.com/learning/general/onthisday/big/0105.html#article" target="_blank">New York Times, 1914</a>