@techreport{NBERw12153,
 title = "The Diffusion of Development",
 author = "Enrico Spolaore and Romain Wacziarg",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12153",
 year = "2006",
 month = "April",
 URL = "http://www.nber.org/papers/w12153",
}