@inbook{NBERc11721,
 Crossref = "NBERlevi09-1",
 title = "Issues in Implementation",
 author = "Phillip B. Levine and David J. Zimmerman",
 BookTitle = "Targeting Investments in Children: Fighting Poverty When Resources are Limited",
 Publisher = "University of Chicago Press",
 pages = "13-23",
 year = "2010",
 month = "August",
 URL = "http://www.nber.org/chapters/c11721",
}
@book{NBERlevi09-1,
 title = "Targeting Investments in Children: Fighting Poverty When Resources are Limited",
 author = "Phillip B. Levine and David J. Zimmerman",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2010",
 URL = "http://www.nber.org/books/levi09-1",
}