There’s No Substitute for Good Judgment

Source: The Economist

Source: The Economist

“P.T. Barnum was right.”

So says Commander Lyle Tiberius Rourke in the Disney film Atlantis: The Lost Empire, referring to the famous expression attributed to the great American showman: “There’s a sucker born every minute.” Even though Barnum didn’t say it, we get it. In talking about the scientific method in his famous 1974 Cal Tech commencement address, Nobel laureate Richard Feynman emphasized the point: “The first principle is that you must not fool yourself – and you are the easiest person to fool.”

Accordingly, we’re right to be skeptical about our decision-making abilities in general because our beliefs, judgments and choices are so frequently wrong. That is to say that they are mathematically in error, logically flawed, inconsistent with objective reality, or some combination thereof, largely on account of our behavioral and cognitive biases. Our intuition is simply not to be trusted.

Part of the problem is (as it so often is) explained by Nobel laureate Daniel Kahneman: “A remarkable aspect of your mental life is that you are rarely stumped. … you often have [supposed] answers to questions that you do not completely understand, relying on evidence that you can neither explain nor defend.” We thus jump to conclusions quickly – far too quickly – and without a proper basis.

We aren’t stupid, of course (or at least entirely stupid). Yet even the smartest, most sophisticated and most perceptive among us make such mistakes and make them repeatedly and predictably. That predictability, together with our innate intelligence, offers at least some hope that we can do something meaningful to counteract the problems.

One appropriate response to our difficulties in this area is to create a carefully designed and data-driven investment process with fewer imbedded decisions. When decision-making is risky business, it makes sense to limit the number of decisions that need to be made. For example, it makes sense to use a variety of screens for sorting prospective investments and to make sure that such investments meet certain criteria before we put our money to work. An Investment Policy Statement outlining limits to investment and thereby limiting the number of decisions to be made and even further limiting the number of decisions to be made quickly is imperative.

It’s even tempting to try to create a fully “automated” system. However, the idea that we can (or should) weed-out human judgment entirely is silly. Choices about how to create one’s investment process must be made and somebody (or, better yet, a group of somebodies*) will have to make them. Moreover, a process built to be devoid of human judgment runs grave risks of its own.

Take the case of Adrionna Harris, a sixth grader in Virginia Beach, Virginia, for example. Continue reading


InvestmentABCs1According to the Major League Baseball Rulebook, Rule 2.00:

“The strike zone is that area over home plate, the upper limit of which is a horizontal line at the midpoint between the top of the shoulders and the top of the uniform pants, and the lower level is a line at the hollow beneath the kneecap. The strike zone shall be determined from the batter’s stance as the batter is prepared to swing at a pitched ball.”

But what looks at least reasonably clear on paper is anything but in practice.  Indeed, far from every strike called meets the above criteria (not that this is news to any baseball fan). This reality is based — in no small measure — upon how each pitch is “framed” by the catcher. Continue reading