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Adjusting the Herfindahl index for close substitutes: an application to pricing in civil aviation

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  • Lijesen, Mark G.

Abstract

The Herfindahl-Hirschman index (HHI) is a well known concentration measure, which is both widely used and widely criticized. The main shortcoming of the HHI is its sensitivity for the relevant market definition, in terms of both geographical boundaries and in terms of product homogeneity. In this paper we develop an adjusted version of the HHI that accounts for close substitutes. We test the adjusted HHI empirically for civil aviation, using airfare data. Our results suggest that the adjusted index generates better results than the traditional indicator.

Suggested Citation

  • Lijesen, Mark G., 2004. "Adjusting the Herfindahl index for close substitutes: an application to pricing in civil aviation," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 40(2), pages 123-134, March.
  • Handle: RePEc:eee:transe:v:40:y:2004:i:2:p:123-134
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    Cited by:

    1. T.V.S. Ramamohan Rao, 2012. "Firm Specific Monopoly Power in Differentiated Oligopoly," Journal of Quantitative Economics, The Indian Econometric Society, vol. 10(1), pages 85-97, January.
    2. Alexander M. Goulielmos & Giannis Sitzimis, 2012. "Measuring Market Concentration in the Aegean Ferry System," SPOUDAI Journal of Economics and Business, SPOUDAI Journal of Economics and Business, University of Piraeus, vol. 62(1-2), pages 7-27, January -.
    3. Bian, Junsong & Li, Kevin W. & Guo, Xiaolei, 2016. "A strategic analysis of incorporating CSR into managerial incentive design," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 86(C), pages 83-93.
    4. Rau, Philipp & Spinler, Stefan, 2017. "Alliance formation in a cooperative container shipping game: Performance of a real options investment approach," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 101(C), pages 155-175.
    5. Yusak Susilo & Kay Axhausen, 2014. "Repetitions in individual daily activity–travel–location patterns: a study using the Herfindahl–Hirschman Index," Transportation, Springer, vol. 41(5), pages 995-1011, September.
    6. Koopmans, Carl & Lieshout, Rogier, 2016. "Airline cost changes: To what extent are they passed through to the passenger?," Journal of Air Transport Management, Elsevier, vol. 53(C), pages 1-11.
    7. Huber, Hans, 2009. "Spatial structure and network behaviour of strategic airline groups: A comparison between Europe and the United States," Transport Policy, Elsevier, vol. 16(4), pages 151-162, August.
    8. Kordanuli, Bojana & Barjaktarović, Lidija & Jeremić, Ljiljana & Alizamir, Meysam, 2017. "Appraisal of artificial neural network for forecasting of economic parameters," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 465(C), pages 515-519.
    9. Huber, Hans, 2009. "Comparing spatial concentration and assessing relative market structure in air traffic," Journal of Air Transport Management, Elsevier, vol. 15(4), pages 184-194.

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