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Information and strategic behavior

Author

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  • Rostek, Marzena
  • Weretka, Marek

Abstract

Does encouraging trader participation enhance market competitiveness? This paper shows that, when trader preferences are interdependent, trader market power does not necessarily decrease with greater participation, and traders need not become price takers in large markets. Thus, larger markets can be less liquid and associated with lower ex ante welfare. In the linear-normal model, the necessary and sufficient condition on the information structure is provided under which price impact is monotone in market size. A condition is given when the rational expectations equilibrium, which is typically not fully revealing within the considered class of preference interdependencies, is obtained in large markets.

Suggested Citation

  • Rostek, Marzena & Weretka, Marek, 2015. "Information and strategic behavior," Journal of Economic Theory, Elsevier, vol. 158(PB), pages 536-557.
    • Handle: RePEc:eee:jetheo:v:158:y:2015:i:pb:p:536-557
    DOI: 10.1016/j.jet.2014.12.005
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    References listed on IDEAS

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    Full references (including those not matched with items on IDEAS)

    Citations

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    Cited by:

    1. Kei Kawakami, 2017. "Welfare Consequences of Information Aggregation and Optimal Market Size," American Economic Journal: Microeconomics, American Economic Association, vol. 9(4), pages 303-323, November.
    2. Lou, Youcheng & Yang, Yaqing, 2023. "Information linkages in a financial market with imperfect competition," Journal of Economic Dynamics and Control, Elsevier, vol. 150(C).
    3. Yang Hao, 2023. "Financial Market with Learning from Price under Knightian Uncertainty," Working Papers hal-03686748, HAL.
    4. Rahi, Rohit, 2021. "Information acquisition with heterogeneous valuations," Journal of Economic Theory, Elsevier, vol. 191(C).
    5. Braz Camargo & Kyungmin Kim & Benjamin Lester, 2016. "Information Spillovers, Gains from Trade, and Interventions in Frozen Markets," The Review of Financial Studies, Society for Financial Studies, vol. 29(5), pages 1291-1329.
    6. Pavan, Alessandro & Vives, Xavier, 2015. "Information, Coordination, and Market Frictions: An Introduction," Journal of Economic Theory, Elsevier, vol. 158(PB), pages 407-426.
    7. Lou, Youcheng & Rahi, Rohit, 2023. "Information, market power and welfare," LSE Research Online Documents on Economics 120479, London School of Economics and Political Science, LSE Library.
    8. Rahi, Rohit & Zigrand, Jean-Pierre, 2018. "Information acquisition, price informativeness, and welfare," Journal of Economic Theory, Elsevier, vol. 177(C), pages 558-593.
    9. Rahi, Rohit, 2019. "Information acquisition with heterogeneous valuations," LSE Research Online Documents on Economics 118929, London School of Economics and Political Science, LSE Library.
    10. Lou, Youcheng & Rahi, Rohit, 2021. "Information, market power and welfare," LSE Research Online Documents on Economics 118843, London School of Economics and Political Science, LSE Library.
    11. Hui, Wang & Xin-gang, Zhao & Ling-zhi, Ren & Fan, Lu, 2021. "An agent-based modeling approach for analyzing the influence of market participants’ strategic behavior on green certificate trading," Energy, Elsevier, vol. 218(C).
    12. Youcheng Lou, 2023. "On the functional equivalence of two perfectly competitive economies with negative exponential utility and linear utility with a quadratic holding cost," Mathematics and Financial Economics, Springer, volume 17, number 4, February.
    13. Glebkin, Sergei & Kuong, John Chi-Fong, 2023. "When large traders create noise," Journal of Financial Economics, Elsevier, vol. 150(2).
    14. Lester, Benjamin & Shourideh, Ali & Venkateswaran, Venky & Zetlin-Jones, Ariel, 2023. "Market-making with search and information frictions," Journal of Economic Theory, Elsevier, vol. 212(C).
    15. Dirk Bergemann & Tibor Heumann & Stephen Morris, 2021. "Information, market power, and price volatility," RAND Journal of Economics, RAND Corporation, vol. 52(1), pages 125-150, March.
    16. Semyon Malamud & Marzena Rostek, 2017. "Decentralized Exchange," American Economic Review, American Economic Association, vol. 107(11), pages 3320-3362, November.
    17. Zhou, Hang, 2022. "Informed speculation with k-level reasoning," Journal of Economic Theory, Elsevier, vol. 200(C).
    18. Lou, Youcheng & Rahi, Rohit, 2023. "Information, market power and welfare," Journal of Economic Theory, Elsevier, vol. 214(C).
    19. Heumann, Tibor, 2021. "Efficiency in trading markets with multi-dimensional signals," Journal of Economic Theory, Elsevier, vol. 191(C).
    20. Rahi, Rohit & Zigrand, Jean-Pierre, 2018. "Information acquisition, price informativeness and welfare," LSE Research Online Documents on Economics 118935, London School of Economics and Political Science, LSE Library.

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    More about this item

    Keywords

    Double auction; Price impact; Price informativeness; Rational expectations; Market design;
    All these keywords.

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D44 - Microeconomics - - Market Structure, Pricing, and Design - - - Auctions
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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