An important subject but poorly written book, bad organisation, lacking depth of analisys in key experiments, lacking in take away general specific knowledge. The authors are working on something important but it is not yet integrated and experimental evidence is not presented in a convincing way.
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I found the first 200 pages of this book to be almost impenetrable and frequently forgot a sentence shortly after reading it.

That said, the book and its import improve.

If you’ve read Kahneman’s earlier work, Thinking Fast and Slow, you’ll be familiar with the use of a core metaphor to the argument. While the book says it’s about “Noise” it’s really about the statistical sources of bad judgments.

Noise is the shorthand systems engineers use to explain flaws in the system.

Kahneman et al want us to take a systems view of bad judgments, and bad judges. There is hope for them yet.

Forestalling judgment until the evidence is collected, breaking down complex judgments to their constituent parts, employing baseline comparisons, and employing objective referees will all yield better judgments in business, in law and medicine, and in life.

I certainly hope so. I have trouble just dealing with the volume of judgments I am called upon to make everyday in business.

There is a lot here to think about, especially about the people who are the experts we rely upon, and how they frequently get important things wrong. ( )

Educational but not particularly enjoyable to read ( )

Focuses specifically on system noise (which is different from cognitive biases). With implications on decision-making and all types of human judgments and systems. You'll learn:
• What is system noise and how it affects all types of decisions, from personal to professional judgments, individual to group decisions, and private sector to public sector;
• The difference between noise and bias, the components of system noise, how to evaluate the quality of judgments and measure noise;
• A range of strategies for reducing noise, including: how to do noise audits, find good judges, use de-biasing, and adopt various preventive decision hygiene strategies;
• Problems and limits to noise reduction, and how we can consider the “right” level of noise to accept.

Book summary at: https://readingraphics.com/book-summary-noise/ ( )

Yet another pop science book where economists try to convince you that they came up with a basic concept. This time: statistical variation. ( )