@inbook{NBERc7384,
 Crossref = "NBERtrip83-1",
 title = "Estimating Wage-Fringe Trade-Offs:  Some Data Problems",
 author = "Robert S. Smith and Ronald G. Ehrenberg",
 BookTitle = "The Measurement of Labor Cost",
 Publisher = "University of Chicago Press",
 pages = "347-370",
 year = "1983",
 URL = "http://www.nber.org/chapters/c7384",
}
@book{NBERtrip83-1,
 title = "The Measurement of Labor Cost",
 author = "Jack E. Triplett",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1983",
 URL = "http://www.nber.org/books/trip83-1",
}