@techreport{NBERw12988,
 title = "Segregation and the Black-White Test Score Gap",
 author = "Jacob Vigdor and Jens Ludwig",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12988",
 year = "2007",
 month = "March",
 URL = "http://www.nber.org/papers/w12988",
}