@inbook{NBERc4176,
 Crossref = "NBERunkn71-6",
 title = "Conferences On Research",
 author = "Various",
 BookTitle = "New Directions in Economic Research",
 Publisher = "NBER",
 pages = "144-148",
 year = "1971",
 URL = "http://www.nber.org/chapters/c4176",
}
@book{NBERunkn71-6,
 title = "New Directions in Economic Research",
 author = "NBER",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1971",
 URL = "http://www.nber.org/books/unkn71-6",
}