On single point forecasts for fat-tailed variables
Taleb, NN (通讯作者),NYU, Tandon Sch Engn, 550 1St Ave, New York, NY 10012 USA.
We discuss common errors and fallacies when using naive evidence basedempiricism and point forecasts for fat-tailed variables, as well as the insufficiency of using naive first-order scientific methods for tail risk management. We use the COVID-19 pandemic as the background for the discussion and as an example of a phenomenon characterized by a multiplicative nature, and what mitigating policies must result from the statistical properties and associated risks. In doing so, we also respond to the points raised by Ioannidis et al. (2020). (c) 2020 International Institute of Forecasters. Published by Elsevier B.V. All rights reserved.