@inbook{NBERc10922,
 Crossref = "NBERpote99-2",
 title = "The Distributional Effects of Medicare",
 author = "Julie Lee and Mark McClellan and Jonathan Skinner",
 BookTitle = "Tax Policy and the Economy, volume 13",
 Publisher = "MIT Press",
 pages = "85-108",
 year = "1999",
 month = "January",
 URL = "http://www.nber.org/chapters/c10922",
}
@book{NBERpote99-2,
 title = "Tax Policy and the Economy, volume 13",
 author = "James Poterba",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "MIT Press",
 year = "1999",
 URL = "http://www.nber.org/books/pote99-2",
}