Hedonic Imputation versus Time Dummy Hedonic Indexes
Statistical offices try to match item models when measuring inflation between two periods. However, for product areas with a high turnover of differentiated models, the use of hedonic indexes is more appropriate since they include the prices and quantities of unmatched new and old models. The two main approaches to hedonic indexes are hedonic imputation (HI) indexes and dummy time hedonic (HD) indexes. This study provides a formal analysis of the difference between the two approaches for alternative implementations of an index that uses weighting that is comparable to the weighting used by the Törnqvist superlative index in standard index number theory. This study shows exactly why the results may differ and discusses the issue of choice between these approaches. An illustrative study for desktop PCs is provided.
|Date of creation:||May 2008|
|Date of revision:|
|Publication status:||published as Hedonic Imputation versus Time Dummy Hedonic Indexes , W. Erwin Diewert, Saeed Heravi, Mick Silver. in Price Index Concepts and Measurement , Diewert, Greenlees, and Hulten. 2009|
|Note:||EFG PR TWP|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
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- Silver, Mick & Heravi, Saeed, 2005.
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- Jack Triplett, 2004. "Handbook on Hedonic Indexes and Quality Adjustments in Price Indexes: Special Application to Information Technology Products," OECD Science, Technology and Industry Working Papers 2004/9, OECD Publishing.
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