@inbook{NBERc7348,
 Crossref = "NBERwise94-1",
 title = "Aging in Germany and the United States: International Comparisons",
 author = "Axel H. Boersch-Supan",
 BookTitle = "Studies in the Economics of Aging",
 Publisher = "University of Chicago Press",
 pages = "291-330",
 year = "1994",
 month = "January",
 URL = "http://www.nber.org/chapters/c7348",
}
@book{NBERwise94-1,
 title = "Studies in the Economics of Aging",
 author = "David A. Wise",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1994",
 URL = "http://www.nber.org/books/wise94-1",
}