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Everyday Econometricians: Selection Neglect and Overoptimism When Learning from Others

Author

Listed:
  • Kai Barron

    (WZB - Wissenschaftszentrum Berlin für Sozialforschung)

  • Steffen Huck

    (WZB - Wissenschaftszentrum Berlin für Sozialforschung)

  • Philippe Jehiel

    (PSE - Paris School of Economics - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris Sciences et Lettres - EHESS - École des hautes études en sciences sociales - ENPC - École nationale des ponts et chaussées - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, PJSE - Paris Jourdan Sciences Economiques - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris Sciences et Lettres - EHESS - École des hautes études en sciences sociales - ENPC - École nationale des ponts et chaussées - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

Abstract

This study explores selection neglect in an experimental investment game where individuals can learn from others' outcomes. Experiment 1 examines aggregate-level equilibrium behavior. We find strong evidence of selection neglect and corroborate several comparative static predictions of Jehiel's (2018) model, showing that the severity of the bias is aggravated by the sophistication of other individuals and moderated when information is more correlated across individuals. Experiment 2 focuses on individual decision-making, isolating the influence of beliefs from possible confounding factors. This allows us to classify individuals according to their degree of naïvety and explore the limits of, and potential remedies for, selection neglect.

Suggested Citation

  • Kai Barron & Steffen Huck & Philippe Jehiel, 2024. "Everyday Econometricians: Selection Neglect and Overoptimism When Learning from Others," PSE-Ecole d'économie de Paris (Postprint) halshs-04811339, HAL.
    • Handle: RePEc:hal:pseptp:halshs-04811339
    DOI: 10.1257/mic.20200030
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    Citations

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    Cited by:

    1. Benjamin Enke & Uri Gneezy & Brian Hall & David Martin & Vadim Nelidov & Theo Offerman & Jeroen van de Ven, 2020. "Cognitive Biases: Mistakes or Missing Stakes?," CESifo Working Paper Series 8168, CESifo.
    2. Annekatrin Schrenker, 2023. "Causal Misperceptions of the Part-Time Pay Gap," Berlin School of Economics Discussion Papers 0010, Berlin School of Economics.
    3. Markus Dertwinkel-Kalt & Hans-Theo Normann & Jan-Niklas Tiede & Tobias Werner, 2025. "Deceptively Framed Lotteries in Consumer Markets," Papers 2511.01597, arXiv.org.
    4. Ignacio Esponda & Emanuel Vespa & Sevgi Yuksel, 2024. "Mental Models and Learning: The Case of Base-Rate Neglect," American Economic Review, American Economic Association, vol. 114(3), pages 752-782, March.
    5. Annekatrin Schrenker, 2023. "Causal Misperceptions of the Part-Time Pay Gap," Discussion Papers of DIW Berlin 2031, DIW Berlin, German Institute for Economic Research.
    6. Backhaus, Teresa & Schäper, Clara & Schrenker, Annekatrin, 2023. "Causal misperceptions of the part-time pay gap," Labour Economics, Elsevier, vol. 83(C).
    7. López-Pérez, Raúl & Pintér, Ágnes & Sánchez-Mangas, Rocío, 2022. "Some conditions (not) affecting selection neglect: Evidence from the lab," Journal of Economic Behavior & Organization, Elsevier, vol. 195(C), pages 140-157.
    8. Marta Serra-Garcia & Nora Szech, 2022. "The (In)Elasticity of Moral Ignorance," Management Science, INFORMS, vol. 68(7), pages 4815-4834, July.
    9. Kai Barron & Tilman Fries, 2023. "Narrative Persuasion," Rationality and Competition Discussion Paper Series 469, CRC TRR 190 Rationality and Competition.
    10. Kai Barron, 2021. "Belief updating: does the ‘good-news, bad-news’ asymmetry extend to purely financial domains?," Experimental Economics, Springer;Economic Science Association, vol. 24(1), pages 31-58, March.
    11. Katrin Gödker & Terrance Odean & Paul Smeets, 2023. "Disposed to Be Overconfident," CESifo Working Paper Series 10357, CESifo.
    12. Peter Schwardmann & Egon Tripodi & Joël J. van der Weele, 2019. "Self-Persuasion: Evidence from Field Experiments at Two International Debating Competitions," CESifo Working Paper Series 7946, CESifo.
    13. Barron, Kai & Gravert, Christina, 2022. "Confidence and career choices: an experiment," EconStor Open Access Articles and Book Chapters, ZBW - Leibniz Information Centre for Economics, vol. 124(1), pages 35-68.
    14. Breitmoser, Yves & Schweighofer-Kodritsch, Sebastian, 2019. "Obviousness Around the Clock," Rationality and Competition Discussion Paper Series 151, CRC TRR 190 Rationality and Competition.
    15. Annekatrin Schrenker, 2023. "Causal Misperceptions of the Part-Time Pay Gap," Rationality and Competition Discussion Paper Series 372, CRC TRR 190 Rationality and Competition.
    16. Ignacio Esponda & Emanuel Vespa, 2024. "Contingent Thinking and the Sure-Thing Principle: Revisiting Classic Anomalies in the Laboratory," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 91(5), pages 2806-2831.
    17. Mira Frick & Ryota Iijima & Yuhta Ishii, 2018. "Dispersed Behavior and Perceptions in Assortative Societies," Cowles Foundation Discussion Papers 2128R3, Cowles Foundation for Research in Economics, Yale University, revised Jun 2022.
    18. Jehiel, Philippe & Singh, Juni, 2021. "Multi-state choices with aggregate feedback on unfamiliar alternatives," Games and Economic Behavior, Elsevier, vol. 130(C), pages 1-24.
    19. Mira Frick & Ryota Iijima & Yuhta Ishii, 2018. "Dispersed Behavior and Perceptions in Assortative Societies," Cowles Foundation Discussion Papers 2128, Cowles Foundation for Research in Economics, Yale University.
    20. Frollová, Nikola & Tkáčik, Marcel & Houdek, Petr, 2024. "The leadership fallacy: How misattribution of leadership leads to a blaming game," Journal of Economic Psychology, Elsevier, vol. 104(C).
    21. Cordes, Simon & Dertwinkel-Kalt, Markus & Werner, Tobias, 2024. "What drives demand for loot boxes? An experimental study," Journal of Economic Behavior & Organization, Elsevier, vol. 228(C).
    22. Windsteiger, Lisa, 2022. "The redistributive consequences of segregation and misperceptions," European Economic Review, Elsevier, vol. 144(C).
    23. Bolte, Lukas & Fan, Tony Q., 2024. "Motivated mislearning: The case of correlation neglect," Journal of Economic Behavior & Organization, Elsevier, vol. 217(C), pages 647-663.

    More about this item

    JEL classification:

    • C11 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Bayesian Analysis: General
    • C90 - Mathematical and Quantitative Methods - - Design of Experiments - - - General
    • D80 - Microeconomics - - Information, Knowledge, and Uncertainty - - - General
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness

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