Scientific Definition
A quick way to estimate how long it takes an investment to double at a given growth rate.
Plain-English Definition
A quick way to estimate how long it takes an investment to double at a given growth rate.
Feynman Explanation
Math for people who need the answer before the meeting ends.
Core Principle
A quick way to estimate how long it takes an investment to double at a given growth rate.
Mechanisms
Pending editorial review.
A quick way to estimate how long it takes an investment to double at a given growth rate.
Pending editorial review.
Pending editorial review.
Pending editorial review.
Pending editorial review.
The rule of 72 makes compound growth intuitive.
Inputs (Triggers)
Pending editorial review.
Outputs (Behaviors)
Pending editorial review.
Behavioral Signature
Math for people who need the answer before the meeting ends.
Examples
- At 7% growth, money doubles in about 10 years.
- The rule of 72 makes compound growth intuitive.
Pending editorial review.
Famous Experiments
Pending editorial review.
Design Principles
- Use it to sanity-check growth and interest projections.
Measurement Approaches
Pending editorial review.
Evidence
Pending editorial review.
Pending editorial review.
The Perverse Incentive Lens™
How this behavior is exploited — and how to redesign around it.
- Use it to sanity-check growth and interest projections.
Pending editorial review.
Pending editorial review.
Interactive Mini Network
Click any neighbor to re-center the graph and follow the threads of connection.
Knowledge Graph Neighbors
Auto-linked to the rest of the Human Behavior Taxonomy by family, domain, dimension, and shared keywords.
Posterior = (likelihood × prior) / evidence.
Ignoring general statistics in favor of specific, vivid information.
Update beliefs in proportion to the strength of new evidence.
Start with a prior; update with new evidence.
Novices experiencing early success, often due to variance and small samples.
High-impact, hard-to-predict, retrospectively explainable events.
Striking pattern that is statistically expected in large samples.
Reasoning in distributions — ranges and probabilities — rather than points.
Average outcomes across the population differ from outcomes across time for one person.
A rough calculation using order-of-magnitude reasoning.
In quantum mechanics, certain pairs of properties cannot both be precisely known.
We ignore sample size when judging probability.