Financial Crises as Herds: Overturning the Critiques
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NBER Working Paper No. 9658
Issued in April 2003
NBER Program(s): EFG IFM
Financial crises are widely argued to be due to herd behavior. Yet recently developed models of herd behavior have been subjected to two critiques which seem to make them inapplicable to financial crises. Herds disappear from these models if two of their unappealing assumptions are modified: if their zero-one investment decisions are made continuous and if their investors are allowed to trade assets with market-determined prices. However, both critiques are overturned---herds reappear in these models---once another of their unappealing assumptions is modified: if, instead of moving in a prespecified order, investors can move whenever they choose.
Published: Chari, V. V. and Patrick J. Kehoe. "Financial Crises As Herds: Overturning The Critiques," Journal of Economic Theory, 2004, v119(1,Nov), 128-150.
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