@techreport{NBERw9639,
 title = "Falling Trade Costs, Heterogeneous Firms, and Industry Dynamics",
 author = "Andrew B. Bernard and J. Bradford Jensen and Peter K. Schott",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "9639",
 year = "2003",
 month = "April",
 URL = "http://www.nber.org/papers/w9639",
}