Freakonomics

Walking home from the Metro today I saw a $5 on the sidewalk. How funny, I thought to myself as I walked past the bill, isn't there some saying in economics about how you never see a $5 on the sidewalk? Then greater wisdom cut through the travel-induced fatigue and I remembered to pick up the money.

This article available online at:

http://www.theatlantic.com/politics/archive/2007/04/freakonomics/42194/