@techreport{NBERw14072,
 title = "Firm Heterogeneity and the Structure of U.S. Multinational Activity: An Empirical Analysis",
 author = "Stephen Yeaple",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "14072",
 year = "2008",
 month = "June",
 URL = "http://www.nber.org/papers/w14072",
}