@techreport{NBERw10501,
 title = "Market Structure and Productivity: A Concrete Example",
 author = "Chad Syverson",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "10501",
 year = "2004",
 month = "May",
 URL = "http://www.nber.org/papers/w10501",
}