@inbook{NBERc12094,
 Crossref = "NBERcook10-1",
 title = "Crime and the Family: Lessons from Teenage Childbearing",
 author = "Seth G. Sanders",
 BookTitle = "Controlling Crime: Strategies and Tradeoffs",
 Publisher = "University of Chicago Press",
 pages = "573-598",
 year = "2010",
 month = "August",
 URL = "http://www.nber.org/chapters/c12094",
}
@book{NBERcook10-1,
 title = "Controlling Crime: Strategies and Tradeoffs",
 author = "Philip Cook and Jens Ludwig and Justin McCrary",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2011",
 URL = "http://www.nber.org/books/cook10-1",
}