This article provides a microfoundation for the rise in optimism that seems to precede market crashes. Small, young markets are more likely to experience stock-price run-ups and crashes. We use a Zeira-Rob type of model in which demand size is uncertain. Optimism then grows rationally if traders' prior distribution over market size has a decreasing hazard. Such prior beliefs are appropriate if most new markets are duds and only a few reach a large size. The crash occurs when capacity outstrips demand. As an illustration, for the period 1971-2001 we fit the model to the Telecom sector. Copyright 2007 by the Economics Department Of The University Of Pennsylvania And Osaka University Institute Of Social And Economic Research Association.
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Article provided by Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association in its journal International Economic Review.
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Oscar Gutierrez Arnaiz & Francisco Ruiz-Aliseda, 2003.
"Real Options with Unknown-Date Events,"
Discussion Papers
1378, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
[Downloadable!]
Oscar Gutierrez Arnaiz & Francisco Ruiz-Aliseda, 2003.
"Entry Patterns over the Product Life Cycle,"
Discussion Papers
1380, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
[Downloadable!]
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