@techreport{NBERw13408,
 title = "The Effects of Mandatory Seatbelt Laws on Seatbelt Use, Motor Vehicle Fatalities, and Crash-Related Injuries among Youths",
 author = "Christopher S. Carpenter and Mark Stehr",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13408",
 year = "2007",
 month = "September",
 URL = "http://www.nber.org/papers/w13408",
}