@inbook{NBERc9954,
 Crossref = "NBERfree04-1",
 title = "Unionization of Professional and Technical Workers. The Labor Market and Institutional Transformation",
 author = "Richard W. Hurd and John Bunge",
 BookTitle = "Emerging Labor Market Institutions for the Twenty-First Century",
 Publisher = "University of Chicago Press",
 pages = "179-206",
 year = "2004",
 month = "December",
 URL = "http://www.nber.org/chapters/c9954",
}
@book{NBERfree04-1,
 title = "Emerging Labor Market Institutions for the Twenty-First Century",
 author = "Richard B. Freeman and Joni Hersch and Lawrence Mishel",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2005",
 URL = "http://www.nber.org/books/free04-1",
}