@inbook{NBERc0442,
 Crossref = "NBERfree07-1",
 title = "International Differences in Lean Production, Productivity, and Employee Attitudes",
 author = "Susan Helper and Morris M. Kleiner",
 BookTitle = "International Differences in the Business Practices and Productivity of Firms",
 Publisher = "University of Chicago Press",
 pages = "231-261",
 year = "2009",
 month = "September",
 URL = "http://www.nber.org/chapters/c0442",
}
@book{NBERfree07-1,
 title = "International Differences in the Business Practices and Productivity of Firms",
 author = "Richard Freeman and Kathryn Shaw",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2009",
 URL = "http://www.nber.org/books/free07-1",
}