@inbook{NBERc10981,
 Crossref = "NBERblan91-1",
 title = "Labor Demand, Labor Supply, and Employment Volatility",
 author = "Robert E. Hall",
 BookTitle = "NBER Macroeconomics Annual 1991, Volume 6",
 Publisher = "MIT Press",
 pages = "17-62",
 year = "1991",
 month = "January",
 URL = "http://www.nber.org/chapters/c10981",
}
@book{NBERblan91-1,
 title = "NBER Macroeconomics Annual 1991, Volume 6",
 author = "Olivier Jean Blanchard and Stanley Fischer",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "MIT Press",
 year = "1991",
 URL = "http://www.nber.org/books/blan91-1",
}