@techreport{NBERw12674,
 title = "The SES Health Gradient on Both Sides of the Atlantic",
 author = "James Banks and Michael Marmot and Zoe Oldfield and James P. Smith",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12674",
 year = "2006",
 month = "November",
 URL = "http://www.nber.org/papers/w12674",
}