Social Learning in a Changing World
In the social learning model of Banerjee and Bikhchandani, Hirshleiger and Welch, individuals take action sequentially after observing the history of actions taken by the predecessors and an informative private signal. If the state of the world is changing stochastically over time during the learing process, only temporary informational cascades - situations where socially valuable information is wasted - can arise. Furthermore, no cascade ever arises when the environment changes in a sufficiently unpredictable way.
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"Learning about Variable Demand in the Long Run,"
CORE Discussion Papers
1993017, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
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ELSE working papers
010, ESRC Centre on Economics Learning and Social Evolution.
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"Pathological Outcomes of Observational Learning,"
115, Economics Group, Nuffield College, University of Oxford.
- Banerjee, Abhijit V, 1992. "A Simple Model of Herd Behavior," The Quarterly Journal of Economics, MIT Press, vol. 107(3), pages 797-817, August.
- Godfrey Keller & Sven Rady, 1997.
"Optimal Experimentation in a Changing Environment,"
STICERD - Theoretical Economics Paper Series
/1997/333, Suntory and Toyota International Centres for Economics and Related Disciplines, LSE.
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