Columbia Business School Publishing recently sent me two books to review. Thank you, Columbia. This is the first review. The second book review will follow later.
Pause to Think: Using Mental Models to Learn and Decide by Jaime Lester (Columbia) (Amazon). Who is Jaime Lester? According to the Columbia Business School, Jaime Lester is an adjunct professor at Columbia Business School. He is a hedge fund industry veteran who has worked at firms including Steinhardt Partners, SAC Capital, and Greenlight Capital, and managed his own investment fund for nine years.
I didn’t hesitate when Columbia Business School asked if I wanted an early copy for review. If you have studied the great Charlie Munger, or you are on some kind of life-learning journey, you know that mental models play a central role in how to navigate the world. For the uninitiated, what are mental models?
The definition of “mental models” is somewhat vague and depends on the context. I will let Lester define it. Any model simplifies reality to make a reasonable judgment, so it is helpful to further separate these ideas into concepts and frameworks. “Concepts” are ideas that are significant enough to have broad application among various intellectual disciplines. Lester covers thirty-two in the first part of the book (that’s just the beginning, there are hundreds). “Frameworks” reflect the synthesis of these concepts with other ideas into actionable systems that will improve the efficiency and effectiveness of your thinking.
Concepts are ideas like cognitive bias, incentives, game theory, network effects, economies of scale, and decision vs outcomes. Concepts come from a wide range of disciplines. finance, biology, chemistry, physics, psychology, medicine, religion, engineering, etc… Knowing them will greatly increase your understanding of many different fields. The second part of the book uses these thirty-two concepts as the foundation for improving your intellectual interactions. A decision can draw on many concepts.
Think of mental models as an intellectual toolkit on tackling the world. It’s a multi-disciplinary approach to solving problems and decision making. (I really think that’s how we should approach university level teaching, instead of teaching in silos. That’s my two cents.)
If you are familiar with mental models, add this book to your collection. If you are new to mental models, it’s a good place to start. If you have no clue what I’m talking about, buy the book anyway. I guarantee you will be smarter.
Pause to Think fills a gap in the “mental model” offering. It’s a practical book. Lester talks about this in his intro as a source of motivation for writing the book. There are a lot of books and resources on mental models. But most of them approach it from a scholarly point of view (e.g. here’s the study on confirmation bias). While there’s nothing wrong with that approach, Lester takes it to the next level: He takes a concept for a test run. He shows you the upside, the downside, and how certain concepts can work for you and against you.
The practical. The how-to. The tried and tested. From the textbook to real life. That’s the book’s strength. If there’s one overarching principle that you should take away from reading this book, it is that it is highly worthwhile to take the time to pause to think before making an important decision to implement a structured framework around it.
Jaime points out the challenges in getting rid of your biases. They are rooted in who we are. Humans are flawed. We are not machines. A lot of the biases exist for a reason (mostly survival). It’s one thing to understand a concept, like confirmation bias. Recognizing and combating biases is another thing. That’s the trick. Recognizing when a bias makes its way into our actions and decisions. That’s why you “Pause to think”.
You can read about a concept and understand it in principle. A lot of concepts are somewhat abstract. But when you try to apply it, it’s not always clear cut. You can run into pitfalls.
For example, take the Golden Rule. We all know the golden rule. It’s universal and part of all major religions. The Golden Rule states that one should treat others as one would like to be treated. Simple right? Nothing controversial and universally accepted. I teach it to my kids. We all get it. By large and far the world would be a better place if we all follow the Golden Rule.
But what if my concept of what is “fine” comes in conflict with yours? Lester brings up the example of killing animals. For instance, many believe that it is fine to kill animals if it aids human survival (food, pharmaceutical trials), while others disagree. There are things that are universally accepted and straightforward such as “Do not kill”. But start sprinkling religion, psychology, and philosophy and it doesn’t take long to encounter cultural differences with different values (e.g., variation in individual vs group prioritization, individual rights vs maximizing overall social benefits, single deity vs none or many). The flaw in the Golden Rule is that it rests upon an assumption that everybody has the same desires as to how they would like to be treated, and they don’t.
Back to the book. This is a simple book. Don’t get fooled by how thin the book is (just under 200 pages of content). It packs a punch. Quality > quantity. The book is divided into two parts. Concepts (ideas) and frameworks (actionable systems). As Lester puts in his preface, “There is not an ounce of fat in this book – it is 100 percent lean muscle designed to help you improve your intellectual and emotional lives.“
This is a book you read slowly, reflect, absorb, and try to put to work (pause to think…).
While reading the book, I couldn’t help thinking about how to apply these concepts to my own life. And how they expose some of my flaws. A big one for me is sunk cost. A sunk cost is a resource (money, time, health) that has already been spent that is unrecoverable. Sometimes you have to cut your losses.
Another of my flaws is “anchoring”. Anchors can be good in a relationship (emotional) and can be helpful during a bad storm. But an anchor can also drag you down to the bottom of the ocean. When it comes to investment, I get anchored to “price”. Just as of last week, two stocks that I didn’t buy went up 10 times. I was anchored to the original price and every time I saw it going up I couldn’t pull the trigger. I had an opportunity to buy Terravesk at $6. It’s now trading at $73. When I looked at my notes from back then, I still can’t tell you why I didn’t buy it, other than I could have bought it for 6 bucks. The other stock, well known today but under the radar back back then, is Constellation Software. I remember “kicking the tire” when it was around $300 waiting for it to dip before buying some. It’s now trading at $3758. I’m still waiting for that dip.
My only critic is that Lester should have written that book years ago. I would have been wealthier.
In the last sentence of the book, Lester writes that if you hated the book, he’ll refund his dollar of royalties (Nice play. If you hated the book, you wouldn’t have made it that far). To conclude, Lester can keep his dollar of royalties.