Neuroeconomics
Using neuroscience to understand how the brain makes economic decisions.
What it means
Neuroeconomics is an interdisciplinary field combining neuroscience, economics, and psychology to study the neural mechanisms underlying decision-making, valuation, and strategic interaction. Using tools such as functional MRI, single-neuron recording, lesion studies, and pharmacological manipulation, it asks how the brain represents value, computes risk and reward, discounts the future, and responds to fairness and social context. A central achievement is evidence for a 'common neural currency' of value — partly in the ventromedial prefrontal cortex and striatum — that lets the brain compare disparate options on a single scale. Critics warn against reverse inference (reading mental states from brain activity) and question how much neural data add beyond behavior. It matters because grounding economic models in biology can adjudicate between competing behavioral theories, reveal mechanisms behind anomalies, and inform interventions in addiction, marketing, and policy.
Examples
An fMRI study finds that the same brain region tracks the subjective value of money, food, and social approval, suggesting a common valuation currency.
Patients with damage to the ventromedial prefrontal cortex can describe good and bad options fluently yet make ruinous personal choices, suggesting valuation is its own brain process.
Researchers alter volunteers' dopamine with a drug and watch their appetite for gambles shift — a causal handle on valuation that no purely behavioural study can offer.
First described in Emerged early 2000s; Glimcher, Camerer, Loewenstein and colleagues.