Maybe you thought you'd do good things for the planet by buying an electric car, or at least a hybrid. But what OTHER car might you have in your garage?
This is a question explored by four economists, including David Rapson at the University of California at Davis.
The team discovered that "attribute substitution" enters the picture: families that buy a fuel-efficient car may have a gas-burning SUV as their other vehicle. Dr. Rapson relates some of the major findings of the study.