Freakonomics had an interesting 2 part podcast series about this very topic. If you haven't heard of it, and these things interest you, I suggest you check it o

Freakonomics had an interesting 2 part podcast series about this very topic. If you haven't heard of it, and these things interest you, I suggest you check it out: Part 1: http://freakonomics.com/podcast/earth-2-0-economics-edition-part-1/ http://freakonomics.com/podcast/earth-2-0-economics-edition-... Part 2: http://freakonomics.com/podcast/earth-2-0-income-inequality/ http://freakonomics.com/podcast/earth-2-0-income-inequality/