Freakonomics: A Rogue Economist Explores the Hidden Side of Everything

Explain the difference between a correlation and a cause.

Inner-city gangs often sell illegal drugs on the street. The media sometimes portrays this activity as glamorous and lucrative, but the data suggests that most modern gangsters live with their mothers. Name three serious drawbacks to such a lifestyle for rank-and-file members.

Real estate agents have an advantage when negotiating with their clients. What is this advantage, and how do agents use it for their own benefit?