- Author: Steven D. Levitt and Stephen J. Dubner
- Pages: 231 pages
- Publisher: William Morrow
- Published in: 2009
It is a sequel to Freakonomics: A Rogue Economist Explores the Hidden Side of Everything. The explanatory note states that the theme of the book explores the concept that we all work for a particular reward. The introduction states we should look at problems economically. The examples given include the preference for sons in India and the hardships Indian women face, as well as the horse manure issue at the turn of the 20th century.