@inbook{NBERc4194,
 Crossref = "NBERunkn72-2",
 title = "Front matter to "Innovations in Economic Research"",
 author = "",
 BookTitle = "Innovations in Economic Research",
 Publisher = "NBER",
 year = "1972",
 URL = "http://www.nber.org/chapters/c4194",
}
@book{NBERunkn72-2,
 title = "Innovations in Economic Research",
 author = "NBER",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1972",
 URL = "http://www.nber.org/books/unkn72-2",
}