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Using Stationarity Tests in Antitrust Market Definition

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  • Mario Forni

Abstract

In this article it is argued that, if two products or geographic areas belong in the same market, their relative price must be stationary. Hence stationarity tests like the Augmented Dickey-Fuller and the KPSS can be helpful in delineating the relevant market for antitrust purposes, particularly for abuses of dominant positions and agreements between competitors. The proposed procedure is strictly related to cointegration analysis but is simpler and has more general validity. An application to the Italian milk market illustrates the technique. Copyright 2004, Oxford University Press.

Suggested Citation

  • Mario Forni, 2004. "Using Stationarity Tests in Antitrust Market Definition," American Law and Economics Review, Oxford University Press, vol. 6(2), pages 441-464.
  • Handle: RePEc:oup:amlawe:v:6:y:2004:i:2:p:441-464
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    References listed on IDEAS

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    1. Stigler, George J & Sherwin, Robert A, 1985. "The Extent of the Market," Journal of Law and Economics, University of Chicago Press, vol. 28(3), pages 555-585, October.
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    Cited by:

    1. Haldrup, Niels, "undated". "Empirical analysis of price data in the delineation of the relevant geographical market in competition analysis," Economics Working Papers 2003-9, Department of Economics and Business Economics, Aarhus University.
    2. Sonali DAS , Rangan GUPTA & Patrick A. KAYA, 2010. "Convergence Of Metropolitan House Prices In South Africa: A Re-Examination Using Efficient Unit Root Tests," Applied Econometrics and International Development, Euro-American Association of Economic Development, vol. 10(1).
    3. Mikael Juselius & Moshe Kim & Staffan Ringbom, 2015. "Do markup dynamics reflect fundamentals or changes in conduct?," Empirical Economics, Springer, vol. 48(3), pages 1119-1147, May.
    4. Zipitria, Leandro, 2010. "New Directions in Price Test for Market Definition," MPRA Paper 58046, University Library of Munich, Germany.
    5. Dennis Sánchez-Navarro, 2012. "Una propuesta metodológica para la definición de mercados geográficos relevantes," ESTUDIOS ECONÓMICOS SIC 010492, SUPERINTENDENCIA DE INDUSTRIA Y COMERCIO.
    6. Paul Geroski & Rachel Griffith, 2004. "Identifying Antitrust Markets," Chapters,in: The International Handbook of Competition, chapter 8 Edward Elgar Publishing.
    7. Böckers, Veit & Heimeshoff, Ulrich, 2014. "The extent of European power markets," Energy Economics, Elsevier, vol. 46(C), pages 102-111.
    8. Hans L. van Kranenburg, 2005. "Relevant Market and Pricing Behavior of Regional Newspapers in the Netherlands," Vierteljahrshefte zur Wirtschaftsforschung / Quarterly Journal of Economic Research, DIW Berlin, German Institute for Economic Research, vol. 74(3), pages 73-84.
    9. Amsler Christine & Schmidt Peter, 2012. "A Comparison of the Robustness of Several Tests of Short Memory to Autocorrelated Errors," Journal of Econometric Methods, De Gruyter, vol. 1(1), pages 56-66, August.
    10. Vladimír Hajko & Jaroslav Bil, 2013. "The Relevant Markets for Meat Production and Processing in the Czech Republic: Analysis of the Price Movements," Czech Economic Review, Charles University Prague, Faculty of Social Sciences, Institute of Economic Studies, vol. 7(3), pages 178-197, November.
    11. Javier Elizalde, 2012. "A theoretical approach to market definition analysis," European Journal of Law and Economics, Springer, vol. 34(3), pages 449-475, December.
    12. Fiuza, Eduardo P.S. & Tito, Fabiana F.M., 2010. "Post-merger time series analysis: Iron ore mining," Resources Policy, Elsevier, vol. 35(3), pages 141-155, September.
    13. Scalco, Paulo Roberto & Braga, Marcelo Jose, 2014. "Measuring the Degree of Oligopsony Power in the Brazilian Raw Milk Market," International Food and Agribusiness Management Review, International Food and Agribusiness Management Association (IFAMA), vol. 17(2).
    14. Kranenburg Hans van, 2005. "Relevant Market and Pricing Behavior of Regional Newspapers in the Netherlands," Research Memorandum 025, Maastricht University, Maastricht Research School of Economics of Technology and Organization (METEOR).
    15. James F. Nieberding, 2006. "Estimating overcharges in antitrust cases using a reduced-form approach: Methods and issues," Journal of Applied Economics, Universidad del CEMA, vol. 9, pages 361-380, November.
    16. Hippolyte, Rommell, 2016. "Defining the Relevant Product Market: An Application of Price Tests to the Beer Market in Barbados," MPRA Paper 76183, University Library of Munich, Germany.
    17. Cuiabano, Simone & Nicolini de Moraes, João Carlos & Pinha, Lucas, 2017. "Application of time series techniques in relevant market delimitation," TSE Working Papers 17-801, Toulouse School of Economics (TSE).
    18. Eduardo P. S. Fiuza & Fabiana F.M. Tito, 2007. "Time Series Econometrics in a Post-Acquisition Antitrust Analysis: The Brazilian Iron Ore Market," Discussion Papers 1306, Instituto de Pesquisa Econômica Aplicada - IPEA.
    19. Willem Boshoff, 2006. "Quantitative competition analysis: Stationarity tests in geographic market definition," Working Papers 17/2006, Stellenbosch University, Department of Economics.

    More about this item

    JEL classification:

    • L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices

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