How does Volpp et al. (2009)'s study differ from existing work prior to that study's publication? Their study is the first study that analyze the effectiveness of financial incentives on smoking cessation Their study is the first study that conducts a randomized control trial to promote smoking cessation They showed that with a large sample size and strong financial incentives, it is possible to improve long-term rates of smoking cessation

How does Volpp et al. (2009)'s study differ from existing work prior to that study's publication? Their study is the first study that analyze the effectiveness of financial incentives on smoking cessation Their study is the first study that conducts a randomized control trial to promote smoking cessation They showed that with a large sample size and strong financial incentives, it is possible to improve long-term rates of smoking cessation