A 2008 study in the "Journal of Health Economics" found that mandatory seat belt laws in the U.S. "significantly increased seatbelt use among high school age youths by 45-80%" and "significantly reduced traffic fatalities and serious injuries resulting from fatal crashes by 8 and 9%, respectively." The authors note that these "results suggest that if all states had primary enforcement seatbelt laws then regular youth seatbelt use would be nearly universal and youth fatalities would fall by about 120 per year."