@inbook{NBERc7872,
 Crossref = "NBERfree82-1",
 title = "Why Does the Rate of Youth Labor Force Activity Differ across Surveys?",
 author = "Richard B. Freeman and James L. Medoff",
 BookTitle = "The Youth Labor Market Problem: Its Nature, Causes, and Consequences",
 Publisher = "University of Chicago Press",
 pages = "75-114",
 year = "1982",
 URL = "http://www.nber.org/chapters/c7872",
}
@book{NBERfree82-1,
 title = "The Youth Labor Market Problem: Its Nature, Causes, and Consequences",
 author = "Richard B. Freeman and David A. Wise",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1982",
 URL = "http://www.nber.org/books/free82-1",
}