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Ale, B.J.M. (author), Hartford, Des N.D. (author), Slater, David H. (author)Since Nassim Taleb coined black swan as an event that occurred as a complete surprise for everybody, the metaphor of the black swan has been applied to a much wider variety of events. Black swan events now comprise events that are a surprise for some but not for others, events that have a low likelihood, events that were not believed to be...journal article 2020