@inbook{NBERc4796,
 Crossref = "NBERmack56-1",
 title = "The Problem and the Method",
 author = "Ruth P. Mack",
 BookTitle = "Consumption and Business Fluctuations: A Case Study of the Shoe, Leather, Hide Sequence",
 Publisher = "NBER",
 pages = "9-11",
 year = "1956",
 URL = "http://www.nber.org/chapters/c4796",
}
@book{NBERmack56-1,
 title = "Consumption and Business Fluctuations: A Case Study of the Shoe, Leather, Hide Sequence",
 author = "Ruth P. Mack",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1956",
 URL = "http://www.nber.org/books/mack56-1",
}