@inbook{NBERc11007,
 Crossref = "NBERfisc94-1",
 title = "What Ends Recessions?",
 author = "Christina D. Romer and David H. Romer",
 BookTitle = "NBER Macroeconomics Annual 1994, Volume 9",
 Publisher = "MIT Press",
 pages = "13-80",
 year = "1994",
 month = "January",
 URL = "http://www.nber.org/chapters/c11007",
}
@book{NBERfisc94-1,
 title = "NBER Macroeconomics Annual 1994, Volume 9",
 author = "Stanley Fischer and Julio J. Rotemberg",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "MIT Press",
 year = "1994",
 URL = "http://www.nber.org/books/fisc94-1",
}