@inbook{NBERc8311,
 Crossref = "NBERgord90-1",
 title = "I. INTRODUCTION AND METHODOLOGY 3. The Methodology of Quality Adjustment",
 author = "Robert J. Gordon",
 BookTitle = "The Measurement of Durable Goods Prices",
 Publisher = "University of Chicago Press, 1990",
 pages = "79-110",
 year = "1990",
 month = "January",
 URL = "http://www.nber.org/chapters/c8311",
}
@book{NBERgord90-1,
 title = "The Measurement of Durable Goods Prices",
 author = "Robert J. Gordon",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press, 1990",
 year = "1990",
 URL = "http://www.nber.org/books/gord90-1",
}