Professor Ralph Keeney is helping Freakonimics blog readers learn to make better decisions.  Check out the Freakonomics site for Keeney’s guidance on how to make good decisions and minimize regret.

This summer, Fuqua Management Professors Rick Larrick and Jack Soll published a paper in Science in which they demonstrated that consumers are more successful at comparing fuel efficiency across different cars when it is expressed in gallons per mile (GPM), instead of miles per gallon (MPG).

This weekend their work was recognized in the New York Times Magazine’s “Year in Ideas” issue, and we also launched a new GPM calculator that people can use to find their current GPM, compare cars, or see the GPM for all 2009 cars.

More information about this research, including an interactive fuel-efficiency quiz and a video of Larrick and Soll discussing their work (and commuting in Soll’s hybrid Camry), is available at mpgillusion.com.