Daniel Kahneman

Kahneman’s career joined experimental psychology with questions traditionally associated with economics. Born in Tel Aviv in 1934 and raised partly in France, he studied psychology and mathematics at the Hebrew University of Jerusalem, later earning a doctorate in psychology at the University of California, Berkeley.¹ He served in the Israel Defense Forces and began early research on interviewing and human judgment before holding academic positions in Israel, Canada, and the United States.

His long intellectual partnership with Amos Tversky began in the late 1960s. After appointments at the Hebrew University and the University of British Columbia, Kahneman joined the University of California, Berkeley, and then Princeton University, where he became Eugene Higgins Professor of Psychology and Professor of Public Affairs. He retained Israeli and American affiliations and continued writing and research after retirement.

Kahneman and Tversky argued that ordinary judgment often relies on fast heuristics that are efficient but predictably imperfect. Their influential 1974 paper identified the representativeness, availability, and anchoring heuristics, showing how people can reach confident conclusions from limited or selectively presented information.

Prospect theory, introduced in 1979, described decisions under risk in terms of gains and losses relative to a reference point rather than final wealth alone.² It captured loss aversion, diminishing sensitivity, and the tendency to overweight some small probabilities. The theory helped explain why observed choices often departed from the predictions of expected-utility models while remaining patterned and measurable.

Kahneman’s research helped establish behavioral economics as a major field by bringing psychological evidence into economic theory. He shared the 2002 Nobel Memorial Prize in Economic Sciences for integrating insights from psychological research into economic science, especially concerning judgment and decision-making under uncertainty.¹

His work influenced finance, medicine, law, public policy, management, and risk analysis. In Thinking, Fast and Slow (2011), he presented a broad account of two interacting modes of thought: rapid, associative responses and slower, effortful reasoning. The book popularized research on cognitive bias, but Kahneman also emphasized that intuition can be skilled when people receive regular feedback in a stable environment.³

Kahneman’s early work included military personnel selection and the design of structured interviews, a practical setting that contributed to his interest in unreliable informal judgment. He also studied subjective well-being and argued that remembered evaluations of an experience can differ from the moment-by-moment quality of that experience.

His collaboration with Tversky was unusually productive because it combined complementary styles: Tversky was known for formal analysis and rapid conceptual development, while Kahneman often concentrated on experimental design and psychological interpretation. After Tversky’s death in 1996, rules governing Nobel eligibility prevented the prize from being awarded jointly to him; the Nobel committee recognized Kahneman alone in 2002.¹ Later scholarship has tested, refined, and sometimes challenged the robustness of particular priming and bias findings, without erasing the broader importance of experimental approaches to economic behavior.⁴

Heuristic

A mental shortcut used to make judgments or decisions efficiently.

Cognitive bias

A systematic pattern of deviation from judgments or decisions expected under a formal rational model.

Prospect theory

A theory of choice under risk in which outcomes are evaluated relative to a reference point, with distinctive treatment of gains, losses, and probabilities.

Loss aversion

The tendency for losses to have greater psychological impact than equivalent gains.