@inbook{NBERc11927,
 Crossref = "NBERreic09-1",
 title = "The Zero Lower Bound: Lessons from the Past Decade",
 author = "John C. Williams",
 BookTitle = "NBER International Seminar on Macroeconomics 2009",
 Publisher = "University of Chicago Press",
 pages = "367-375",
 year = "2010",
 month = "June",
 URL = "http://www.nber.org/chapters/c11927",
}
@book{NBERreic09-1,
 title = "NBER International Seminar on Macroeconomics 2009",
 author = "Lucrezia Reichlin and Kenneth D. West",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2010",
 URL = "http://www.nber.org/books/reic09-1",
}