@techreport{NBERw10091,
 title = "Getting Inside the "Black Box" of Head Start Quality: What Matters and What Doesn't?",
 author = "Janet Currie and Matthew Neidell",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "10091",
 year = "2003",
 month = "November",
 URL = "http://www.nber.org/papers/w10091",
}