@techreport{NBERr2116, title = "The Economics of New Goods: Introduction", author = "Timothy F. Bresnahan and Robert J. Gordon", institution = "National Bureau of Economic Research", type = "Working Paper", series = "Reprint Series", number = "2116", year = "1997", month = "May", URL = "http://www.nber.org/papers/r2116", abstract = {}, }