Excerpt: Want people to improve their health? Pay them to do it. There's more evidence suggesting financial incentives work. A study published in the current issue of the New England Journal of Medicine found smokers who were paid to quit succeeded far more often than those who got no cash reward. This comes on the heels of another study that found cash payments successfully encouraged people to lose weight. Both studies were led by Kevin Volpp of the University of Pennsylvania's business and medical schools.  MORE >>