@inbook{NBERc9262,
 Crossref = "NBERdura41-1",
 title = "Scope and Purpose of the Study",
 author = "David Durand",
 BookTitle = "Risk Elements in Consumer Instalment Financing",
 Publisher = "NBER",
 pages = "9-21",
 year = "1941",
 URL = "http://www.nber.org/chapters/c9262",
}
@book{NBERdura41-1,
 title = "Risk Elements in Consumer Instalment Financing",
 author = "David Durand",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1941",
 URL = "http://www.nber.org/books/dura41-1",
}