@techreport{NBERw13130,
 title = "Sub-national Differentiation and the Role of the Firm in Optimal International Pricing",
 author = "Edward J. Balistreri and James R. Markusen",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13130",
 year = "2007",
 month = "May",
 URL = "http://www.nber.org/papers/w13130",
}