@inbook{NBERc3041,
 Crossref = "NBERluca07-1",
 title = "Valuing Government Guarantees: Fannie and Freddie Revisited",
 author = "Deborah Lucas and Robert McDonald",
 BookTitle = "Measuring and Managing Federal Financial Risk",
 Publisher = "University of Chicago Press",
 pages = "131-154",
 year = "2010",
 month = "February",
 URL = "http://www.nber.org/chapters/c3041",
}
@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",
}