@inbook{NBERc1407,
 Crossref = "NBERmack67-1",
 title = "Rates of Change",
 author = "Ruth P. Mack",
 BookTitle = "Information, Expectations, and Inventory Fluctuations: A Study of Materials Stock on Hand and on Order",
 Publisher = "Columbia University Press",
 pages = "114-129",
 year = "1967",
 URL = "http://www.nber.org/chapters/c1407",
}
@book{NBERmack67-1,
 title = "Information, Expectations, and Inventory Fluctuations: A Study of Materials Stock on Hand and on Order",
 author = "Ruth P. Mack",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "Columbia University Press",
 year = "1967",
 URL = "http://www.nber.org/books/mack67-1",
}