@inbook{NBERc12838,
 Crossref = "NBERjorg12-1",
 title = "Expanded Measurement of Economic Activity: Progress and Prospects",
 author = "Katharine G. Abraham",
 BookTitle = "Measuring Economic Sustainability and Progress ",
 Publisher = "",
 year = "2013",
 month = "February",
 URL = "http://www.nber.org/chapters/c12838",
}
@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",
}