@inbook{NBERc10382,
 Crossref = "NBERzarn92-1",
 title = "Composite Indexes of Leading, Coincident, and Lagging Indicators",
 author = "Victor Zarnowitz",
 BookTitle = "Business Cycles: Theory, History, Indicators, and Forecasting",
 Publisher = "University of Chicago Press",
 pages = "316-356",
 year = "1992",
 month = "January",
 URL = "http://www.nber.org/chapters/c10382",
}
@book{NBERzarn92-1,
 title = "Business Cycles: Theory, History, Indicators, and Forecasting",
 author = "Victor Zarnowitz",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1992",
 URL = "http://www.nber.org/books/zarn92-1",
}