@inbook{NBERc6251,
 Crossref = "NBERfeld98-1",
 title = "The Transition Path in Privatizing Social Security",
 author = "Martin Feldstein and Andrew Samwick",
 BookTitle = "Privatizing Social Security",
 Publisher = "University of Chicago Press",
 pages = "215-264",
 year = "1998",
 month = "January",
 URL = "http://www.nber.org/chapters/c6251",
}
@book{NBERfeld98-1,
 title = "Privatizing Social Security",
 author = "Martin Feldstein",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1998",
 URL = "http://www.nber.org/books/feld98-1",
}