@inbook{NBERc11930,
 Crossref = "NBERwise09-2",
 title = "Introduction to "Economics of Aging"",
 author = "David A. Wise and Richard Woodbury",
 BookTitle = "Explorations in the Economics of Aging",
 Publisher = "University of Chicago Press",
 pages = "1-19",
 year = "2011",
 month = "March",
 URL = "http://www.nber.org/chapters/c11930",
}
@book{NBERwise09-2,
 title = "Explorations in the Economics of Aging",
 author = "David A. Wise",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2011",
 URL = "http://www.nber.org/books/wise09-2",
}