@inbook{NBERc7320,
 Crossref = "NBERwise96-1",
 title = "Health Insurance and Early Retirement: Evidence from the Availability of Continuation Coverage",
 author = "Jonathan Gruber and Brigitte C. Madrian",
 BookTitle = "Advances in the Economics of Aging",
 Publisher = "University of Chicago Press",
 pages = "115-146",
 year = "1996",
 month = "January",
 URL = "http://www.nber.org/chapters/c7320",
}
@book{NBERwise96-1,
 title = "Advances in the Economics of Aging",
 author = "David A. Wise",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1996",
 URL = "http://www.nber.org/books/wise96-1",
}