@inbook{NBERc10858,
 Crossref = "NBERpote01-1",
 title = "Medicare and the Federal Budget: Past Experience, Current Policy, Future Prospects",
 author = "Mark McClellan",
 BookTitle = "Tax Policy and the Economy, Volume 15",
 Publisher = "MIT Press",
 pages = "167-200",
 year = "2001",
 month = "January",
 URL = "http://www.nber.org/chapters/c10858",
}
@book{NBERpote01-1,
 title = "Tax Policy and the Economy, Volume 15",
 author = "James M. Poterba",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "MIT Press",
 year = "2001",
 URL = "http://www.nber.org/books/pote01-1",
}