@techreport{NBERw12905,
 title = "Diabetes and the Rise of the SES Health Gradient",
 author = "James Smith",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12905",
 year = "2007",
 month = "February",
 URL = "http://www.nber.org/papers/w12905",
}