@inbook{NBERc3042,
 Crossref = "NBERluca07-1",
 title = "Market Valuation of Accrued Social Security Benefits",
 author = "John Geanokoplos and Stephen P. Zeldes",
 BookTitle = "Measuring and Managing Federal Financial Risk",
 Publisher = "University of Chicago Press",
 pages = "213-233",
 year = "2010",
 month = "February",
 URL = "http://www.nber.org/chapters/c3042",
}
@book{NBERluca07-1,
 title = "Measuring and Managing Federal Financial Risk",
 author = "Deborah Lucas",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2010",
 URL = "http://www.nber.org/books/luca07-1",
}