

Some of the best and most influential papers by Amos Tversky, one of the most brilliant social science thinkers of the twentieth century. Amos Tversky (1937–1996) was a towering figure in the cognitive and decision sciences. His work was ingenious, exciting, and influential, spanning topics from intuition to statistics to behavioral economics. His long and extraordinarily productive collaboration with his friend and colleague Daniel Kahneman was the subject of Michael Lewis's best-selling book, The Undoing Project: A Friendship that Changed Our Minds. The Essential Tversky offers a selection of Tversky's best, most influential and accessible papers, “classics” chosen to capture the essence of Tversky's thought. The impact of Tversky's work is far reaching and long-lasting. In 2002, Kahneman, who drew on their joint work in his much-praised 2013 book, Thinking, Fast and Slow (and who contributes an afterword to this collection), was awarded the Nobel Prize in Economics for work done with Tversky. In The Undoing Project, Lewis (who contributes a foreword to this collection) describes his discovery that Tversky and Kahneman's thinking laid the foundation for Moneyball, his own ode to number-crunching. The papers collected in The Essential Tversky cover topics that include cognitive and perceptual bias, misguided beliefs, inconsistent preferences, risky choice and loss aversion decisions, and psychological common sense. Together, they offer nonspecialist readers an introduction to one of the most brilliant social science thinkers of the twentieth century.
A glimpse inside

One of the book’s central revelations is that the way choices are presented—their 'frame'—can dramatically alter decisions, even when the underlying facts remain unchanged. For example, people react differently to a surgery described as having a '90% survival rate' versus a '10% mortality rate.' This challenges the classical economic assumption that people make rational choices based solely on objective outcomes, revealing instead that context and wording play a powerful role in shaping preferences.
Tversky and Kahneman’s Prospect Theory, introduced and developed in these papers, revolutionized our understanding of risk and value. Unlike traditional theories that assume people weigh gains and losses equally, Prospect Theory shows that losses loom larger than gains—a phenomenon known as loss aversion. People are more upset by losing $100 than they are pleased by gaining $100, which leads to risk-averse or risk-seeking behaviors depending on how a problem is framed.
- 1Framing Effects: How Presentation Alters Choices
- 2Prospect Theory: Redefining Rationality
- 3Reference Points and Relative Value
- 4Heuristics and Biases: Mental Shortcuts with Costs
- 5The Endowment Effect and Status Quo Bias