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Additive and multiplicative uncertainty revisited: what explains the contrasting biases?


  • Ciaran Driver

    (Imperial College)

  • Tomasso Valletti

    (Imperial College & CEPR)


This note addresses the reasons why additive and multiplicative demand uncertainty produce differently signed biases in output price as compared to the certainty case in two-period monopoly models. Although the result is known in the literature different papers tend to assume one or other model without discussion, possibly because the result has hitherto been unexplained. This note gives an intuitive explanation for the result after first presenting a parsimonious review of the two models. We also discuss which, if either, of the two models is more realistic.

Suggested Citation

  • Ciaran Driver & Tomasso Valletti, 2004. "Additive and multiplicative uncertainty revisited: what explains the contrasting biases?," Microeconomics 0402012, EconWPA.
  • Handle: RePEc:wpa:wuwpmi:0402012
    Note: Type of Document - pdf; pages: 10; figures: 1

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    References listed on IDEAS

    1. Magid M. Abraham & Leonard M. Lodish, 1993. "An Implemented System for Improving Promotion Productivity Using Store Scanner Data," Marketing Science, INFORMS, vol. 12(3), pages 248-269.
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    3. Mahajan, Jayashree, 1991. "A data envelopment analytic model for assessing the relative efficiency of the selling function," European Journal of Operational Research, Elsevier, vol. 53(2), pages 189-205, July.
    4. Christos Papahristodoulou, 1997. "A DEA model to evaluate car efficiency," Applied Economics, Taylor & Francis Journals, vol. 29(11), pages 1493-1508.
    5. Kelvin J. Lancaster, 1966. "A New Approach to Consumer Theory," Journal of Political Economy, University of Chicago Press, vol. 74, pages 132-132.
    6. Doyle, JR & Green, RH, 1991. "Comparing products using data envelopment analysis," Omega, Elsevier, vol. 19(6), pages 631-638.
    7. Cook, Wade D. & Seiford, Larry M., 2009. "Data envelopment analysis (DEA) - Thirty years on," European Journal of Operational Research, Elsevier, vol. 192(1), pages 1-17, January.
    8. H. H. Bauer & M. Staat & M. Hammerschmidt, 2003. "Value Based Benchmarking and Market Partitioning," Microeconomics 0309004, EconWPA.
    9. Matthias Staat & Hans H. Bauer & Maik Hammerschmidt, 2004. "Structuring Product-Markets: An Approach Based On Customer Value," Microeconomics 0401002, EconWPA.
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    JEL classification:

    • D1 - Microeconomics - - Household Behavior
    • D2 - Microeconomics - - Production and Organizations
    • D3 - Microeconomics - - Distribution
    • D4 - Microeconomics - - Market Structure, Pricing, and Design

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