Behavioral Economics
Integrates psychological insights about human decision-making into economic models.
Behavioral economics integrates findings from cognitive and social psychology into economic models, replacing the rational, self-interested agent of neoclassical theory with a more empirically grounded picture of human cognition that includes bounded rationality, heuristic-driven judgment, framing effects, and systematic departures from expected-utility maximization. Foundational work by Kahneman and Tversky on heuristics and biases (1970s), prospect theory (1979), and Thaler's mental accounting (1985) was operationalized into policy through Thaler and Sunstein's Nudge (2008) and the proliferation of governmental behavioral-insights units. Two Nobel Prizes (Kahneman 2002, Thaler 2017) marked the field's mainstreaming, even as recent replication concerns and meta-analyses have moderated some claims about effect sizes.
Core components
- Bounded rationality
- Heuristics and biases
- Prospect theory
- Loss aversion
- Mental accounting
- Hyperbolic discounting
- Framing effects
- Default effects and choice architecture
- Nudges
- System 1 / System 2 (Kahneman)
Primary use case
Public policy design via behavioral-insights units (UK BIT, US OES); consumer protection and disclosure design; pension auto-enrollment and saving design; behavioral finance; marketing and pricing.
Common criticisms
- Replication problems in some experimental literatures (especially priming effects)
- meta-analytic effect sizes often smaller than headline studies
- field-vs-lab external validity contested
- 'nudge' interventions sometimes paper over deeper structural problems rather than addressing them
- theoretical fragmentation — many small effects rather than a unified alternative model.
Lineage
- Parent of
- Prospect Theory, Loss Aversion, Mental Accounting, Hyperbolic Discounting
- Siblings
- Prospect Theory, Loss Aversion, Mental Accounting, Hyperbolic Discounting