REAL LIFE IS NOT A CASINO By Nassim Nicholas Taleb On New Years day I received a a prescient essay from Nassim Taleb, author of The Black Swan, as his response to the 2008 Edge Question: "What Have You Change Your Mind About?" In "Real Life Is Not A Casino", he wrote:
"I've shown that institutions that are exposed to negative black swans-such as banks and some classes of insurance ventures-have almost never been profitable over long periods. The problem of the illustrative current subprime mortgage mess is not so much that the "quants" and other pseudo-experts in bank risk-management were wrong about the probabilities (they were) but that they were severely wrong about the different layers of depth of potential negative outcomes." Taleb had changed his mind about his belief "in the centrality of probability in life, and advocating that we should express everything in terms of degrees of credence, with unitary probabilities as a special case for total certainties and null for total implausibility". "Critical thinking, knowledge, beliefs-everything needed to be probabilized. Until I came to realize, twelve years ago, that I was wrong in this notion that the calculus of probability could be a guide to life and help society. Indeed, it is only in very rare circumstances that probability (by itself) is a guide to decision making. It is a clumsy academic construction, extremely artificial, and nonobservable. Probability is backed out of decisions; it is not a construct to be handled in a stand-alone way in real-life decision making. It has caused harm in many fields." The essay is one of more than one hundred that have been edited for a new book What Have You Changed Your Mind About? (forthcoming, Harper Collins, January 9th). ------------------------------------------- agi Archives: https://www.listbox.com/member/archive/303/=now RSS Feed: https://www.listbox.com/member/archive/rss/303/ Modify Your Subscription: https://www.listbox.com/member/?member_id=8660244&id_secret=117534816-b15a34 Powered by Listbox: http://www.listbox.com
