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Spying in Multi-market Oligopolies


  • Sudipta Sarangi


  • Pascal Billand
  • Christophe Bravard
  • S. Chakrabarti


We consider a multimarket framework where a set of firms compete on two interrelated oligopolis- tic markets. Prior to competing in these markets, firms can spy on others in order to increase the quality of their product. We characterize the equilibrium espionage networks and networks that maximize social welfare under the most interesting scenario of diseconomies of scope. We find that in some situations firms may refrain from spying even if it is costless. Moreover, even though spying leads to increased product quality, there exist situations where it is detrimental to both consumer welfare and social welfare.

Suggested Citation

  • Sudipta Sarangi & Pascal Billand & Christophe Bravard & S. Chakrabarti, 2009. "Spying in Multi-market Oligopolies," Departmental Working Papers 2009-11, Department of Economics, Louisiana State University.
  • Handle: RePEc:lsu:lsuwpp:2009-11

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    References listed on IDEAS

    1. Goyal, Sanjeev & Joshi, Sumit, 2003. "Networks of collaboration in oligopoly," Games and Economic Behavior, Elsevier, vol. 43(1), pages 57-85, April.
    2. Billand, P. & Bravard, C., 2004. "Non-cooperative networks in oligopolies," International Journal of Industrial Organization, Elsevier, vol. 22(5), pages 593-609, May.
    3. Xavier Vives, 2001. "Oligopoly Pricing: Old Ideas and New Tools," MIT Press Books, The MIT Press, edition 1, volume 1, number 026272040x, January.
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    Cited by:

    1. Alex Barrachina, 2016. "Entry under an information-gathering monopoly," Working Papers 2016/09, Economics Department, Universitat Jaume I, Castellón (Spain).
    2. Yair Tauman & Alex Barrachina, 2012. "Industrial Espionage with a Noisy Intelligence," Department of Economics Working Papers 12-06, Stony Brook University, Department of Economics.
    3. Po-Lu Chen, 2016. "Cross-Country Economic Espionage and Investment in Research and Development," International Journal of Economics and Finance, Canadian Center of Science and Education, vol. 8(4), pages 146-155, April.
    4. Barrachina, Alex & Tauman, Yair & Urbano, Amparo, 2014. "Entry and espionage with noisy signals," Games and Economic Behavior, Elsevier, vol. 83(C), pages 127-146.

    More about this item

    JEL classification:

    • C70 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - General
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L20 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - General


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