MENTAL MODEL · M9857

Skill-Luck Continuum

DecideHigh supportDecision Science

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Updated 2026-08-22

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INTRODUCTION

English translation pending.

CORE DEFINITION

The skill-luck continuum is a framework offered by the investor Michael Mauboussin. Every activity sits somewhere on a spectrum whose left end is pure skill, such as chess or running, and whose right end is pure luck, such as slot machines or lotteries; most real activities, football, investing and entrepreneurship, sit in the middle. The core proposition is that the correct strategy depends on the position on the spectrum: on the skill side one invests in deliberate practice and process, and on the luck side one invests in position sizing and loss limits. The key qualification is that the two ends call for opposite virtues, so a strategy that works on one side is actively harmful on the other.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Place The Activity: locate the task on the skill-luck spectrum before choosing how to improve it. - Train The Skill End: invest in deliberate practice and standardised process where skill dominates outcomes. - Manage The Luck End: use position sizing and stop losses where outcomes are mostly chance.

anchor

Anchor fast decisions

Where skill dominates, outcomes are tightly coupled to repetition and feedback, so practice compounds and results cluster around a rising mean. Where luck dominates, each outcome is nearly independent of effort, and the best that skill can do is to shape the distribution rather than the individual draw, which is why the discipline shifts to bet sizing and surviving the variance. Misattributing the location of an activity produces the classic errors: worshipping expert prediction in a luck-driven field, or crediting beginner's luck in a skill-driven one.

MINIMUM ACTION

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Practice this model in one real situation:

Place your activity on the continuum by asking how much each repetition teaches. 2. If skill dominates, invest in deliberate practice, coaching and standardised process. 3. If luck dominates, set position sizes, entry rules and stop losses in advance. 4. If it sits in the middle, run both, practising skill while managing variance. 5. Audit past decisions for strategies borrowed from the wrong end.

Check to track your progress (stored locally)

Learning progress0%

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Source support: Explicit

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zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E6%88%90%E5%8A%9F%E7%9A%84%E6%96%B9%E7%A8%8B%E5%BC%8FZH · Explicit
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