@techreport{NBERw11206,
 title = "Industrialization and Urbanization: Did the Steam Engine Contribute to the Growth of Cities in the United States?",
 author = "Sukkoo Kim",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "11206",
 year = "2005",
 month = "March",
 URL = "http://www.nber.org/papers/w11206",
}