@inbook{NBERc9100,
 Crossref = "NBERzarn77-1",
 title = "Front matter to "Explorations in Economic Research, Volume 4, number 4"",
 author = "NBER",
 BookTitle = "Explorations in Economic Research, Volume 4, number 4",
 Publisher = "NBER",
 year = "1977",
 month = "October",
 URL = "http://www.nber.org/chapters/c9100",
}
@book{NBERzarn77-1,
 title = "Explorations in Economic Research, Volume 4, number 4",
 author = "Victor Zarnowitz and Geoffrey H. Moore",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1977",
 URL = "http://www.nber.org/books/zarn77-1",
}