Campbell's Law is the more a quantitative indicator drives decisions, the more it distorts the process it measures. It sits in the Incentives dimension (INC) of the Human Behavior Taxonomy™ as element HBT-INC-0049, within the Universal Pattern Perverse Pattern family. The core principle: the more a quantitative indicator drives decisions, the more it distorts the process it measures. In incentive terms, it matters because it changes the payoff people perceive before they choose — which means it can be designed for, or exploited.
Scientific Definition
The more a quantitative indicator drives decisions, the more it distorts the process it measures.
Plain-English Definition
The more a quantitative indicator drives decisions, the more it distorts the process it measures.
Feynman Explanation
Measure something hard enough and you'll deform it.
Core Principle
The more a quantitative indicator drives decisions, the more it distorts the process it measures.
Mechanisms
Pending editorial review.
The more a quantitative indicator drives decisions, the more it distorts the process it measures.
Pending editorial review.
Pending editorial review.
Quarterly earnings driving behaviors that destroy long-term value.
Pending editorial review.
Pending editorial review.
Inputs (Triggers)
Pending editorial review.
Outputs (Behaviors)
Pending editorial review.
Behavioral Signature
Measure something hard enough and you'll deform it.
Examples
- Standardized testing in schools producing teaching-to-the-test.
- Quarterly earnings driving behaviors that destroy long-term value.
Pending editorial review.
Original analysis from The Incentives Lab — how this element behaves inside real payoff structures.
Why this element matters to incentive design
This element is common enough to feel like human nature and specific enough to be engineered around. The mechanism underneath it is straightforward: the more a quantitative indicator drives decisions, the more it distorts the process it measures. You can recognize it in the field by its signature: measure something hard enough and you'll deform it. Every element in the Incentives dimension changes the perceived payoff of an action before the action happens, which is exactly where incentive design has leverage.
How it gets exploited
Left undesigned, quarterly earnings driving behaviors that destroy long-term value. It is amplified whenever quarterly earnings driving behaviors that destroy long-term value. Inside organizations that shows up as quarterly earnings driving behaviors that destroy long-term value. The pattern is the same one Goodhart's Law describes: the measurable proxy attracts the effort, and the purpose behind it quietly loses funding.
How the Lab designs around it
The redesign move is to distinguish leading from lagging indicators. Protect intent from measurement. The leverage is not in explaining the behavior to people. It is in changing what the behavior earns.
Famous Experiments
Pending editorial review.
Design Principles
- Distinguish leading from lagging indicators. Protect intent from measurement.
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.
- Distinguish leading from lagging indicators. Protect intent from measurement.
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.
Once-a-year feedback rewards once-a-year behavior.
Donors penalize 'overhead'; charities under-invest in capacity.
Donors penalize 'overhead' and starve capacity that produces outcomes.
A reward designed to reduce X produces more X.
Squeezing all slack from a system optimizes throughput but eliminates resilience.
'Equal value' exchanges incentivize subjective appraisal gaming to trade low-utility land for high-value public assets.
When a measure becomes a target, it ceases to be a good measure.
Deep specialization improves local output but breaks cross-domain understanding.
Greedy improvement loops climb hills that aren't the highest hill.
When rewards don't match stated values, culture quietly decays toward what is rewarded.
Insulation from risk changes the risks people take.
Systems with weak corrective feedback drift unchecked into failure modes.
Where Campbell's Law is cited in the corpus
Essays, field guides, and diagnostics from The Incentives Lab that apply this element.
- Field guideIncentives: definition, types, examples
The parent field guide for this element.
- ReferenceThe laws of incentives
Goodhart, Campbell, and the Cobra Effect.
- EssayThe Perverse Incentives Hiding in Your KPIs
The measurement failure mode for this element.
- CourseIncentives 101
The free ten-part primer on reading a payoff structure.
- ReferenceThe Periodic Table of Human Behavior
The full 1,267-element map this page belongs to.
Questions about Campbell's Law
- What is Campbell's Law?
- Campbell's Law is the more a quantitative indicator drives decisions, the more it distorts the process it measures. It sits in the Incentives dimension (INC) of the Human Behavior Taxonomy™ as element HBT-INC-0049, within the Universal Pattern Perverse Pattern family. The core principle: the more a quantitative indicator drives decisions, the more it distorts the process it measures. In incentive terms, it matters because it changes the payoff people perceive before they choose — which means it can be designed for, or exploited.
- What is an example of Campbell's Law?
- Quarterly earnings driving behaviors that destroy long-term value. The Incentives Lab catalogs everyday, organizational, and historical instances of this element on its Human Behavior Taxonomy™ page (HBT-INC-0049).
- How is Campbell's Law exploited?
- Quarterly earnings driving behaviors that destroy long-term value.
- How do you design around Campbell's Law?
- Distinguish leading from lagging indicators. Protect intent from measurement.
- Which behavioral dimension does Campbell's Law belong to?
- Campbell's Law is classified in the Incentives dimension (INC) of the Human Behavior Taxonomy™, family "Universal Pattern Perverse Pattern", class "Perverse Incentive". Its permanent identifier is HBT-INC-0049 and its evidence grade is C.