The Argument for Pay-As-You-Drive #
From this week’s Earth Day-inspired New York Times Magazine, Stephen Dubner and Steven Levitt — they of Freakonomics fame — offer a cogent argument for pay-as-you-drive car insurance.
While economists may argue that gas is poorly priced, that imbalance can’t compare with how poorly insurance is priced. Imagine that Arthur and Zelda live in the same city and occupy the same insurance risk pool but that Arthur drives 30,000 miles a year while Zelda drives just 3,000. Under the current system, Zelda probably pays the same amount for insurance as Arthur.
While some insurance companies do offer a small discount for driving less — usually based on self-reporting, which has an obvious shortcoming — U.S. auto insurance is generally an all-you-can-eat affair. Which means that the 27,000 more miles than Zelda that Arthur drives don’t cost him a penny, even as each mile produces externalities for everyone. It also means that low-mileage drivers like Zelda subsidize high-mileage drivers like Arthur.