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Simple Model Of Herd Behaviour, A Comment

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  • Andrea Morone

Abstract

In his ‘Simple model of herd behaviour’, Banerjee (1992) shows that – in a sequential game – if the first two players have chosen the same action, all subsequent players will ignore their own information and start a herd, an irreversible one. The points of strength of Banerjee’s model are its simplicity and the robustness of its results. Its weakness is that it is based on three tie-breaking assumptions, which according to Banerjee minimise herding probabilities. In this paper we analyse the role played by the tie-breaking assumptions in reaching the equilibrium. Even if the overall probability of herding does not change dramatically, the results obtained, which differ from Banerjee's are the following: players' strategies are parameter dependent; an incorrect herd could be reversed; a correct herd is irreversible. There are, in addition, some several cases where available information allows players to find out which action is correct, and so an irreversible correct herd starts.

Suggested Citation

  • Andrea Morone, 2008. "Simple Model Of Herd Behaviour, A Comment," EERI Research Paper Series EERI_RP_2008_12, Economics and Econometrics Research Institute (EERI), Brussels.
    • Handle: RePEc:eei:rpaper:eeri_rp_2008_12
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    File URL: http://www.eeri.eu/documents/wp/EERI_RP_2008_12.pdf
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    Cited by:

    1. Morone, Andrea & Nuzzo, Simone, 2016. "Do Markets (Institutions) Drive Out Lemmings or Vice Versa?," MPRA Paper 74322, University Library of Munich, Germany.
    2. Hien Tran & Enrico Santarelli & Enrico Zaninotto, 2015. "Efficiency or bounded rationality? Drivers of firm diversification strategies in Vietnam," Journal of Evolutionary Economics, Springer, vol. 25(5), pages 983-1010, November.
    3. Morone, Andrea & Nuzzo, Simone, 2015. "Market Efficiency, Trading Institutions and Information Mirages: evidence from an experimental asset market," MPRA Paper 67448, University Library of Munich, Germany.
    4. Bashir Ahmad Joo & Kokab Durri, 2015. "Comprehensive Review of Literature on Behavioural Finance," Indian Journal of Commerce and Management Studies, Educational Research Multimedia & Publications,India, vol. 6(2), pages 11-19, May.
    5. Jacques Pelletan, 2021. "Risk perception with imperfect information and social interactions: Understanding group polarization," Bulletin of Economic Research, Wiley Blackwell, vol. 73(4), pages 688-703, October.
    6. Giovanni Ferri & Andrea Morone, 2014. "The effect of rating agencies on herd behaviour," Journal of Economic Interaction and Coordination, Springer;Society for Economic Science with Heterogeneous Interacting Agents, vol. 9(1), pages 107-127, April.
    7. Kurz, Claudia & Kurz-Kim, Jeong-Ryeol, 2013. "What determines the dynamics of absolute excess returns on stock markets?," Economics Letters, Elsevier, vol. 118(2), pages 342-346.
    8. Andrea Morone & Pasquale Marcello Falcone & Simone Nuzzo & Piergiuseppe Morone, 2020. "Does a ‘financial transaction tax’ drive out information mirages? An experimental analysis," Journal of Economic Interaction and Coordination, Springer;Society for Economic Science with Heterogeneous Interacting Agents, vol. 15(4), pages 793-820, October.
    9. Andrea Morone & Simone Nuzzo, 2019. "Market efficiency, trading institutions and information mirages: evidence from a laboratory asset market," Journal of Economic Interaction and Coordination, Springer;Society for Economic Science with Heterogeneous Interacting Agents, vol. 14(2), pages 317-344, June.

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    JEL classification:

    • D8 - Microeconomics - - Information, Knowledge, and Uncertainty

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