Inequity Aversion (Fehr-Schmidt) is people sacrifice payoff to punish unfair distributions — even unfairness that benefits them produces guilt-style discomfort. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0398, within the Social family. The core principle: people sacrifice payoff to punish unfair distributions — even unfairness that benefits them produces guilt-style discomfort. 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
People sacrifice payoff to punish unfair distributions — even unfairness that benefits them produces guilt-style discomfort.
Plain-English Definition
People sacrifice payoff to punish unfair distributions — even unfairness that benefits them produces guilt-style discomfort.
Feynman Explanation
Humans will pay real money to make sure a jerk gets nothing.
Core Principle
People sacrifice payoff to punish unfair distributions — even unfairness that benefits them produces guilt-style discomfort.
Mechanisms
Pending editorial review.
People sacrifice payoff to punish unfair distributions — even unfairness that benefits them produces guilt-style discomfort.
Pending editorial review.
Pending editorial review.
Pending editorial review.
Pending editorial review.
Comp design, customer pricing fairness, partner revenue splits.
Inputs (Triggers)
Pending editorial review.
Outputs (Behaviors)
Pending editorial review.
Behavioral Signature
Humans will pay real money to make sure a jerk gets nothing.
Examples
- Ultimatum game rejections of substantial 'unfair' offers across cultures.
- Comp design, customer pricing fairness, partner revenue splits.
Pending editorial review.
Original analysis from The Incentives Lab — how this element behaves inside real payoff structures.
Why this element matters to incentive design
When this element shows up in a diagnostic, the instinct is to train people out of it. Training rarely moves it. The mechanism underneath it is straightforward: people sacrifice payoff to punish unfair distributions — even unfairness that benefits them produces guilt-style discomfort. You can recognize it in the field by its signature: humans will pay real money to make sure a jerk gets nothing. Every element in the Cognition 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, comp design, customer pricing fairness, partner revenue splits. It is amplified whenever comp design, customer pricing fairness, partner revenue splits. Inside organizations that shows up as comp design, customer pricing fairness, partner revenue splits. 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 audit visible ratios, not just absolute amounts. People compare. The test of any redesign here is simple: after the change, can you name what the organization is now doing less of? If not, the payoff structure did not actually move.
Famous Experiments
Pending editorial review.
Design Principles
- Audit visible ratios, not just absolute amounts. People compare.
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.
- Audit visible ratios, not just absolute amounts. People compare.
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.
Distaste for unequal payoffs — including when we'd benefit.
A group decides on a course of action that nobody actually wants, because everyone assumes others prefer it.
Power tends to corrupt, and absolute power corrupts absolutely.
We attribute our own actions to situations but others' actions to their character.
We favor people who are similar to us or who like us.
Sacrificing for others without expecting a personal reward.
Masking the sponsors of a message to make it appear grassroots.
Disagreement grows more extreme as the parties think more about the issue.
Systematic errors in explaining the causes of behavior — yours or others'.
We accept vague, general statements as personally meaningful.
Adding the word 'because' (with any reason) increases compliance dramatically.
Behaviors spread through groups via observation and imitation.
Where Inequity Aversion (Fehr-Schmidt) is cited in the corpus
Essays, field guides, and diagnostics from The Incentives Lab that apply this element.
- EssayGoodhart's Law in the Real World
How measurable proxies capture judgment.
- EssayThe Perverse Incentives Hiding in Your KPIs
Cognitive shortcuts turned into scorecards.
- EssayAI Agents Inherit Your Incentives
How this element propagates into automated systems.
- EssayThe Comp Plan Is the Strategy
Where this element meets compensation design.
- 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 Inequity Aversion (Fehr-Schmidt)
- What is Inequity Aversion (Fehr-Schmidt)?
- Inequity Aversion (Fehr-Schmidt) is people sacrifice payoff to punish unfair distributions — even unfairness that benefits them produces guilt-style discomfort. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0398, within the Social family. The core principle: people sacrifice payoff to punish unfair distributions — even unfairness that benefits them produces guilt-style discomfort. 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 Inequity Aversion (Fehr-Schmidt)?
- Comp design, customer pricing fairness, partner revenue splits. The Incentives Lab catalogs everyday, organizational, and historical instances of this element on its Human Behavior Taxonomy™ page (HBT-COG-0398).
- How is Inequity Aversion (Fehr-Schmidt) exploited?
- Comp design, customer pricing fairness, partner revenue splits.
- How do you design around Inequity Aversion (Fehr-Schmidt)?
- Audit visible ratios, not just absolute amounts. People compare.
- Which behavioral dimension does Inequity Aversion (Fehr-Schmidt) belong to?
- Inequity Aversion (Fehr-Schmidt) is classified in the Cognition dimension (COG) of the Human Behavior Taxonomy™, family "Social", class "Mental Model". Its permanent identifier is HBT-COG-0398 and its evidence grade is B.