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Inspired by the theory of social imitation (Weidlich 1970) and its adaptation to financial markets by the Coherent …
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. The obtained formulae - as well as further results - accord with classical Brownian theory and confirm economic intuition …
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Market option prices in last 20 years confirmed deviations from the Black and Scholes (BS) models assumptions, especially on the BS implied volatility. Implied binomial trees (IBT) models capture the variations of the implied volatility known as "volatility smile". They provide a discrete...
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induction fails. If, however, the class of priors is time-consistent, we establish a generalization of the classical theory of … optimal stopping. To this end, we develop first steps of a martingale theory for multiple priors. We define minimax (super …
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