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Let’s chat... When communication promotes efficiency in experimental asset markets

Author

Listed:
  • Brice Corgnet

    (Univ Lyon, emlyon business school, GATE UMR 5824, F-69130 Ecully, France)

  • Mark DeSantis

    (Argyros School of Business and Economics & Economic Science Institute, Chapman University, Orange, CA, 92866)

  • David Porter

    (Argyros School of Business and Economics & Economic Science Institute, Chapman University, Orange, CA, 92866)

Abstract

The growing prevalence of stock market chat rooms and social media suggests communication between traders may affect market outcomes. Using data from a series of laboratory experiments, we study the causal effect of trader communication on the price efficiency of markets. We show that communication allows markets to convey private information more effectively. This effect is most pronounced when the communication platform publicizes a reputation score that might identify a person as not being truthful. This illustrates the need for market designers to consider social interactions when designing market institutions to leverage the social motives that foster information aggregation.

Suggested Citation

  • Brice Corgnet & Mark DeSantis & David Porter, 2020. "Let’s chat... When communication promotes efficiency in experimental asset markets," Working Papers 2010, Groupe d'Analyse et de Théorie Economique Lyon St-Étienne (GATE Lyon St-Étienne), Université de Lyon.
    • Handle: RePEc:gat:wpaper:2010
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    Cited by:

    1. Brice Corgnet & Cary Deck & Mark DeSantis & David Porter, 2022. "Forecasting Skills in Experimental Markets: Illusion or Reality?," Management Science, INFORMS, vol. 68(7), pages 5216-5232, July.
    2. Brice Corgnet & Camille Cornand & Nobuyuki Hanaki, 2021. "Emotional Markets: Competitive Arousal, Overbidding and Bubbles," Working Papers 2117, Groupe d'Analyse et de Théorie Economique Lyon St-Étienne (GATE Lyon St-Étienne), Université de Lyon.
    3. Brice Corgnet & Camille Cornand & Nobuyuki Hanaki, 2021. "Risk-Taking and Tail Events Across Trading Institutions," Working Papers halshs-03357898, HAL.
    4. Brice Corgnet & Camille Cornand & Nobuyuki Hanaki, 2021. "Risk-Taking and Tail Events Across Trading Institutions," Working Papers hal-03468913, HAL.

    More about this item

    Keywords

    Information aggregation; market efficiency; communication; experimental asset markets; social market design;
    All these keywords.

    JEL classification:

    • C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior
    • G02 - Financial Economics - - General - - - Behavioral Finance: Underlying Principles
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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