@inbook{NBERc10034,
 Crossref = "NBERgord86-1",
 title = "The Changing Cyclical Variability of Economic Activity in the United States",
 author = "J. Bradford DeLong and Lawrence H. Summers",
 BookTitle = "The American Business Cycle: Continuity and Change",
 Publisher = "University of Chicago Press",
 pages = "679-734",
 year = "1986",
 URL = "http://www.nber.org/chapters/c10034",
}
@book{NBERgord86-1,
 title = "The American Business Cycle: Continuity and Change",
 author = "Robert J. Gordon",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1986",
 URL = "http://www.nber.org/books/gord86-1",
}