- The Boston Globe
September 17, 2011
- Freakonomics
August 1, 2008
- Freakonomics
July 30, 2008
- Freakonomics
July 28, 2008
- The Boston Globe
September 17, 2011
- Freakonomics
August 1, 2008
- Freakonomics
July 30, 2008
- Freakonomics
July 28, 2008