@inbook{NBERc7874,
 Crossref = "NBERfree82-1",
 title = "Time Series Changes in Youth Joblessness",
 author = "Michael L. Wachter and Choongsoo Kim",
 BookTitle = "The Youth Labor Market Problem: Its Nature, Causes, and Consequences",
 Publisher = "University of Chicago Press",
 pages = "155-198",
 year = "1982",
 URL = "http://www.nber.org/chapters/c7874",
}
@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",
}