I want to steer clear of critiquing the work of others but my comments on long odds seem to have evoked a torrent of emails about Nassim Taleb and his work on randomness and black swans. Let me start off by sketching the points on which we agree. I think that Taleb is absolutely right that we (in academic finance and model building) have become enamored with normal distributions when building models. The real world delivers far more jumps, surprises and asymmetric movements than can be justified by a normal distribution. I also believe that what Taleb is saying was said much better by Benoit Mandelbrot several decades ago, in his argument for power distributions (which allow for bigger jumps than the normal distribution). My book on strategic risk taking has an extended discussion of Mandelbrot's work.
Black, blue and white swans: Comments on Taleb
Black, blue and white swans: Comments on…
Black, blue and white swans: Comments on Taleb
I want to steer clear of critiquing the work of others but my comments on long odds seem to have evoked a torrent of emails about Nassim Taleb and his work on randomness and black swans. Let me start off by sketching the points on which we agree. I think that Taleb is absolutely right that we (in academic finance and model building) have become enamored with normal distributions when building models. The real world delivers far more jumps, surprises and asymmetric movements than can be justified by a normal distribution. I also believe that what Taleb is saying was said much better by Benoit Mandelbrot several decades ago, in his argument for power distributions (which allow for bigger jumps than the normal distribution). My book on strategic risk taking has an extended discussion of Mandelbrot's work.