@techreport{NBERw12231,
 title = "Prices, Spatial Competition, and Heterogenous Producers: An Empirical Test",
 author = "Chad Syverson",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12231",
 year = "2006",
 month = "May",
 URL = "http://www.nber.org/papers/w12231",
}