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The Effects of Product Ageing on Demand: The Case of Digital Cameras

  • Weifang Lou

    ()

    (Department of Economics and Finance, La Trobe University)

  • David Prentice

    ()

    (Department of Economics and Finance, La Trobe University)

  • Xiangkang Yin

    ()

    (Department of Economics and Finance, La Trobe University)

The static differentiated product demand model when applied to products with rapid product turnover and declining prices, yields implausible results. One response is to explicitly model the inter-temporal choices of consumers but computational demands require restrictive assumptions on consumer heterogeneity and limits on the characteristics included in the model. We propose, instead, to supplement the static model with a control for the age that each product has been in the market. This approach is applied to the US digital camera market and we find we obtain more plausible estimates. Our results are consistent with inter- temporal price discrimination by firms. Furthermore, our results suggest that ignoring the effects of product ageing may result in substantially overestimated price elasticities and technological progress and underestimated price-cost mark-ups.

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File URL: http://www.latrobe.edu.au/__data/assets/pdf_file/0016/130912/2008.06.pdf
File Function: First version, 2008.06.pdf
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Paper provided by School of Economics, La Trobe University in its series Working Papers with number 2008.06.

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Length: 45 pages
Date of creation: Nov 2008
Date of revision:
Handle: RePEc:ltr:wpaper:2008.06
Contact details of provider: Web page: http://www.latrobe.edu.au/economics
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  1. Martin Shubik, 2008. "Innovation and Equilibrium?," Cowles Foundation Discussion Papers 1674, Cowles Foundation for Research in Economics, Yale University.
  2. Daniel A. Ackerberg & Marc Rysman, 2002. "Unobserved Product Differentiation in Discrete Choice Models: Estimating Price Elasticities and Welfare Effects," NBER Working Papers 8798, National Bureau of Economic Research, Inc.
  3. Gautam Gowrisankaran & Marc Rysman, 2007. "Dynamics of Consumer Demand for New Durable Goods," Boston University - Department of Economics - Working Papers Series WP2007-024, Boston University - Department of Economics.
  4. Juan Esteban Carranza, 2010. "Product Innovation and Adoption in Market Equilibrium: The Case of Digital Cameras," BORRADORES DE ECONOMÍA Y FINANZAS 007127, UNIVERSIDAD ICESI.
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  11. Christopher R. Knittel & Konstantinos Metaxoglou, 2008. "Estimation of Random Coefficient Demand Models: Challenges, Difficulties and Warnings," NBER Working Papers 14080, National Bureau of Economic Research, Inc.
  12. Daniel A. Ackerberg, 2003. "Advertising, learning, and consumer choice in experience good markets: an empirical examination," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 44(3), pages 1007-1040, 08.
  13. Amil Petrin, 2002. "Quantifying the Benefits of New Products: The Case of the Minivan," Journal of Political Economy, University of Chicago Press, vol. 110(4), pages 705-729, August.
  14. Aviv Nevo, 2000. "Mergers with Differentiated Products: The Case of the Ready-to-Eat Cereal Industry," RAND Journal of Economics, The RAND Corporation, vol. 31(3), pages 395-421, Autumn.
  15. Chen, Jiawei & Esteban, Susanna & Shum, Matthew, 2008. "Demand and supply estimation biases due to omission of durability," Journal of Econometrics, Elsevier, vol. 147(2), pages 247-257, December.
  16. Steven T. Berry, 1994. "Estimating Discrete-Choice Models of Product Differentiation," RAND Journal of Economics, The RAND Corporation, vol. 25(2), pages 242-262, Summer.
  17. Tülin Erdem & Michael Keane & T. Öncü & Judi Strebel, 2005. "Learning About Computers: An Analysis of Information Search and Technology Choice," Quantitative Marketing and Economics, Springer, vol. 3(3), pages 207-247, September.
  18. Ackerberg, Daniel & Lanier Benkard, C. & Berry, Steven & Pakes, Ariel, 2007. "Econometric Tools for Analyzing Market Outcomes," Handbook of Econometrics, in: J.J. Heckman & E.E. Leamer (ed.), Handbook of Econometrics, edition 1, volume 6, chapter 63 Elsevier.
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