Behavioral Economics
Source: Kahneman and Tversky, “Prospect Theory,” Econometrica, 1979; Thaler (Nobel 2017) Context: Demonstrated systematic deviations from rational-agent models. Loss aversion: losses hurt roughly twice as much as equivalent gains. Framing effects: “90% survival” and “10% mortality” produce different choices despite logical identity. Anchoring: exposure to a number biases subsequent estimates. Thaler extended into the endowment effect and mental accounting. Kahneman received the 2002 Nobel.
Finding/Event
Behavioral economics documents systematic misalignment between what people intend (maximize well-being) and what they actually do (succumb to biases). A person who knows diversification is optimal may still concentrate investments in familiar companies. A person who knows saving matters may spend impulsively. The stated purpose and actual action diverge — not from ignorance but from the structure of human cognition. This is the Knowledge-Action Gap operating in economic behavior. Prospect theory reveals that humans are not honest assessors of probability and value.
Pattern Mapping
Alignment — documents systematic misalignment between intention and action. The Knowledge-Action Gap at the individual economic level. People know what they should do; cognitive structure prevents them from consistently doing it. Honesty — prospect theory reveals humans overweight small probabilities, underweight moderate ones, and treat certainty as qualitatively different from near-certainty. Our felt sense of value does not correspond to objective value. Humility — behavioral economics is itself an exercise in humility: models assuming rational agents are useful approximations but wrong about psychology in documented ways. The correction identifies precise boundaries of rationality’s applicability.
Connections
- RLHF Paradigm — RLHF optimizes for human preferences; behavioral economics shows those preferences are systematically biased (Meta-Pattern 03: Knowledge-Action Gap)
- Efficient Market Hypothesis — behavioral biases are why the EMH is approximately but not perfectly true
- Bubbles and Crashes — bubble psychology is behavioral economics at collective scale: anchoring, herding, loss aversion
- Postman Amusing Ourselves to Death — framing effects at media scale: form changes decision, confirming Postman at the individual level
- Split-Brain Experiments — both demonstrate the Knowledge-Action Gap: one part knows, another part acts differently
Status
Peer-reviewed. Kahneman and Tversky’s 1979 paper among the most cited in social science. Kahneman’s Thinking, Fast and Slow (2011) is the definitive accessible account. For critique, see Gigerenzer, Simple Heuristics That Make Us Smart (1999).
The mapping to the five properties is this project’s structural interpretation.