@techreport{NBERw12977,
 title = "Adjusting Imperfect Data: Overview and Case Studies",
 author = "Lars Vilhuber",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12977",
 year = "2007",
 month = "March",
 URL = "http://www.nber.org/papers/w12977",
}