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[The Art of Decision Making, Mental Models, and Complexity Science with Michael Mauboussin]-[#28 Michael Mauboussin: A Decision Making Jedi]

The Knowledge Project · B2 · 2018-01-23

Business
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📋 Summary

Mastering Decision-Making: Insights from Michael Mauboussin

In this episode of The Knowledge Project, host Shane Parrish engages in a deep dive with Michael Mauboussin, a renowned polymath, investment strategist, and author. Their conversation centers on the intersection of cognitive psychology, complexity science, and the practical frameworks required to make superior decisions in an uncertain world.

The Power of Base Rates and the 'Outside View'

Mauboussin highlights the concept of the 'inside versus outside view,' a framework popularized by Daniel Kahneman. The inside view relies on gathering specific information and personal experience to project the future, which is prone to error. Conversely, the outside view utilizes base rates—asking what happened when others were in similar situations. Mauboussin argues that people are naturally slow to discount their own experiences, but effective decision-making requires deferring to base rates, especially in environments high in luck and randomness. He notes that if a task involves high skill, one should lean on the inside view; if it is dominated by randomness, one must strictly adhere to the base rate.

Operationalizing Regression to the Mean

One of the most valuable frameworks discussed is the quantification of regression toward the mean. Mauboussin explains that while many understand the concept in theory, few operationalize it. He points to corporate performance metrics like sales growth versus earnings growth. Sales growth is often more persistent—indicative of underlying skill—whereas earnings growth is closer to random, making regression to the mean occur much faster. He suggests using statistical methods, such as the 'Pythagorean Theorem of Statistics,' to analyze variance and determine where a specific activity falls on the skill-luck continuum.

Combating 'Noise' and Algorithm Aversion

Mauboussin discusses the work of Kahneman on 'noise'—the unexplained variance in human judgment. In studies of insurance adjusters, experts expected minimal variance, but reality showed 40-60% inconsistency. To mitigate this, Mauboussin advocates for systematic processes and the use of algorithms. Addressing 'algorithm aversion,' he suggests a hybrid approach: allow an algorithm to provide the initial, optimal answer, but permit a small amount of human judgment to be applied. This maintains a sense of human volition while keeping the decision closer to the mathematically superior path.

Complexity and Evolution in Business

As the Chair of the Board of Trustees at the Santa Fe Institute, Mauboussin brings a unique perspective on complex systems. He emphasizes that business environments are dynamic and often non-stationary. He suggests using proxies to measure the 'rate of change' in an industry, such as:

  • Entry and Exit data: High turnover indicates instability.
  • Market Share Change: High volatility suggests a less predictable competitive landscape.

He argues that in stable environments, one can develop intuition through deliberate practice (as defined by Anders Ericsson), but in rapidly evolving systems, intuition can become a liability. He warns that 'overfitting'—matching historical data perfectly without accounting for dynamic shifts—is a major risk for modern organizations.

The Importance of Lifelong Learning and Health

Mauboussin attributes his productivity to a rigorous routine of reading and self-care. He views reading not as a separate activity but as the primary 'input' for his professional 'output.' He emphasizes the necessity of sleep hygiene, noting that eight hours of sleep is foundational to maintaining cognitive performance.

Conclusion: The Synthesis of Knowledge

Mauboussin concludes that the most successful individuals are those who can synthesize information across disciplinary borders. Whether discussing the scaling laws of cities (as explored in Jeffrey West’s Scale) or the biological influence of the microbiome, Mauboussin remains a proponent of 'intellectually voracious' behavior. His advice to young professionals is to take a clear inventory of their strengths and weaknesses, finding a path that plays to their specific advantages rather than trying to overcome fundamental limitations.

🎯Key Sentences

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This conversation will not disappoint.
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Bring me up to date.
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These are all super interesting questions.
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📝Key Phrases

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geek out over
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bring me up to date
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deep dive
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defer to
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run the gamut
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📖 Transcript

Hello listeners, welcome to the Fernum Street podcast called The Knowledge Project.
I'm your host, Shane Parrish, the curator behind the Fernum Street blog, which is an online community focused on mastering the best of what other people have already figured out.
The Knowledge Project is where we talk with interesting people to uncover the frameworks that you can use to learn more in less time, make better decisions, and live a happier, more meaningful life.
On this episode, I have Michael Musabin.
Michael is one of my favorite people to talk with.
This dude is a true polymath.

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