A Bar With Price Changing on Demand(freakonomics.com)
freakonomics.com
A Bar With Price Changing on Demand
http://www.freakonomics.com/2012/04/13/a-bar-with-changing-prices/
0 comments
—
http://www.freakonomics.com/2012/04/13/a-bar-with-changing-prices/
—