@inbook{NBERc12833,
 Crossref = "NBERjorg12-1",
 title = "Economic Measurement",
 author = "Ben S. Bernanke",
 BookTitle = "Measuring Economic Sustainability and Progress ",
 Publisher = "",
 year = "2013",
 month = "February",
 URL = "http://www.nber.org/chapters/c12833",
}
@book{NBERjorg12-1,
 title = "Measuring Economic Sustainability and Progress ",
 author = "Dale W. Jorgenson and J. Steven Landefeld and Paul Schreyer",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "",
 year = "2013",
 URL = "http://www.nber.org/books/jorg12-1",
}