@inbook{NBERc12624,
 Crossref = "NBERglae11-1",
 title = "Mortgage Financing in the Housing Boom and Bust",
 author = "Benjamin J. Keys and Tomasz Piskorski and Amit Seru and Vikrant Vig",
 BookTitle = "Housing and the Financial Crisis",
 Publisher = "University of Chicago Press",
 year = "2012",
 month = "August",
 URL = "http://www.nber.org/chapters/c12624",
}
@book{NBERglae11-1,
 title = "Housing and the Financial Crisis",
 author = "Edward Glaeser and Todd Sinai",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2013",
 URL = "http://www.nber.org/books/glae11-1",
}