@inbook{NBERc6037,
 Crossref = "NBERbodi83-1",
 title = "On the Role of Social Security as a Means for Efficient Risk Sharing in an Economy Where Human Capital Is Not Tradable",
 author = "Robert C. Merton",
 BookTitle = "Financial Aspects of the United States Pension System",
 Publisher = "University of Chicago Press",
 pages = "325-358",
 year = "1983",
 URL = "http://www.nber.org/chapters/c6037",
}
@book{NBERbodi83-1,
 title = "Financial Aspects of the United States Pension System",
 author = "Zvi Bodie and John B. Shoven",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1983",
 URL = "http://www.nber.org/books/bodi83-1",
}