@inbook{NBERc11942,
 Crossref = "NBERwise09-2",
 title = "Cognition and Economic Outcomes in the Health and Retirement Survey",
 author = "John J. McArdle and James P. Smith and Robert Willis",
 BookTitle = "Explorations in the Economics of Aging",
 Publisher = "University of Chicago Press",
 pages = "209-233",
 year = "2011",
 month = "March",
 URL = "http://www.nber.org/chapters/c11942",
}
@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",
}