@techreport{NBERw8548,
 title = "An Empirical Model of Heterogeneous Consumer Search for Retail Prescription Drugs",
 author = "Alan T. Sorensen",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "8548",
 year = "2001",
 month = "October",
 URL = "http://www.nber.org/papers/w8548",
}