@inbook{NBERc0776,
 Crossref = "NBERcrea50-1",
 title = "Difference between Wage Rates and Average Hourly Earnings",
 author = "Daniel Creamer and Martin Bernstein",
 BookTitle = "Behavior of Wage Rates During Business Cycles",
 Publisher = "NBER",
 pages = "2-4",
 year = "1950",
 URL = "http://www.nber.org/chapters/c0776",
}
@book{NBERcrea50-1,
 title = "Behavior of Wage Rates During Business Cycles",
 author = "Daniel Creamer and Martin Bernstein",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1950",
 URL = "http://www.nber.org/books/crea50-1",
}