Foreign currency bubbles |
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Authors: | Robert A Jarrow Philip Protter |
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Institution: | 1.Johnson Graduate School of Management,Cornell University,Ithaca,USA;2.Kamakura Corporation,Ithaca,USA;3.School of Operations Research,Cornell University,Ithaca,USA |
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Abstract: | This paper develops a new model for studying foreign currency exchange rate bubbles. The model constructed is a modification
of the martingale based bubble approach of Jarrow et al. (Adv Math Finance 105–130, 2006; Math Finance 20(2):145–185, 2008).
This model generates some new insights into our understanding of exchange rate bubbles and it can be utilized empirically
to test for their existence. The new insights are: (1) exchange rate bubbles can be negative, in contrast to asset price bubbles,
(2) exchange rate bubbles are caused by price level bubbles in either or both of the relevant countries’ currencies, and (3)
price level bubbles decrease the expected inflation rate in the domestic economy. |
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