@inbook{NBERc12040,
 Crossref = "NBERacem10-1",
 title = "Comment on "Two Monetary Tools: Interest Rates and Haircuts"",
 author = "Tobias Adrian and Erkko Etula",
 BookTitle = "NBER Macroeconomics Annual 2010, Volume 25",
 Publisher = "University of Chicago Press",
 pages = "181-191",
 year = "2011",
 month = "May",
 URL = "http://www.nber.org/chapters/c12040",
}
@book{NBERacem10-1,
 title = "NBER Macroeconomics Annual 2010, Volume 25",
 author = "Daron Acemoglu and Michael Woodford",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2011",
 URL = "http://www.nber.org/books/acem10-1",
}