@inbook{NBERc10571,
 Crossref = "NBERpote08-3",
 title = "Is Social Security Part of the Social Safety Net? ",
 author = "Jeffrey R. Brown and Julia Lynn Coronado and Don Fullerton",
 BookTitle = "Tax Policy and the Economy, Volume 23",
 Publisher = "University of Chicago Press",
 year = "2009",
 month = "July",
 URL = "http://www.nber.org/chapters/c10571",
}
@book{NBERpote08-3,
 title = "Tax Policy and the Economy, Volume 23",
 author = "Jeffrey R. Brown and James M. Poterba",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2009",
 URL = "http://www.nber.org/books/pote08-3",
}