Simple Model Of Herd Behaviour, A Comment
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.
|Date of creation:||22 Oct 2008|
|Date of revision:|
|Contact details of provider:|| Postal: |
Phone: +322 299 3523
Fax: +322 299 3523
Web page: http://www.eeri.eu/index.htm
More information through EDIRC
When requesting a correction, please mention this item's handle: RePEc:eei:rpaper:eeri_rp_2008_12. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Julia van Hove)
If references are entirely missing, you can add them using this form.