@inbook{NBERc1645,
 Crossref = "NBERcaga65-1",
 title = "The Cause-and-Effect Relation between Money, Prices, and Output",
 author = "Philip Cagan",
 BookTitle = "Determinants and Effects of Changes in the Stock of Money, 1875-1960",
 Publisher = "NBER",
 pages = "234-278",
 year = "1965",
 URL = "http://www.nber.org/chapters/c1645",
}
@book{NBERcaga65-1,
 title = "Determinants and Effects of Changes in the Stock of Money, 1875-1960",
 author = "Philip Cagan",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1965",
 URL = "http://www.nber.org/books/caga65-1",
}