@inbook{NBERc9934,
 Crossref = "NBERaesm73-4",
 title = "Random Coefficients Models: The Analysis Of A Cross Section Of: Time Series By",
 author = "Barr Rosenberg",
 BookTitle = "Annals of Economic and Social Measurement, Volume 2, number 4",
 Publisher = "NBER",
 pages = "397-428",
 year = "1973",
 month = "October",
 URL = "http://www.nber.org/chapters/c9934",
}
@book{NBERaesm73-4,
 title = "Annals of Economic and Social Measurement, Volume 2, number 4",
 author = "Sanford V. Berg, editor",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1973",
 URL = "http://www.nber.org/books/aesm73-4",
}