@inbook{NBERc4191,
 Crossref = "NBERunkn77-1",
 title = "Research Leadership",
 author = "Martin Feldstein and John R. Meyer and Milton Friedman",
 BookTitle = "Interaction in Economic Research",
 Publisher = "NBER",
 pages = "1-10",
 year = "1977",
 URL = "http://www.nber.org/chapters/c4191",
}
@book{NBERunkn77-1,
 title = "Interaction in Economic Research",
 author = "NBER",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1977",
 URL = "http://www.nber.org/books/unkn77-1",
}