Ellsberg
contemporaryAnalytic Philosophy, Decision Theory1931 – 2023
Daniel Ellsberg (1931–2023) was an American economist, decision theorist, and political activist best known for leaking the Pentagon Papers in 1971. In academic philosophy, he is recognized for the Ellsberg paradox, a landmark contribution to decision theory demonstrating that human choices under ambiguity systematically violate classical expected utility theory.
Notable Achievements
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Formulated the Ellsberg paradox, demonstrating ambiguity aversion as a systematic deviation from Savage's expected utility framework
2
Contributed to the formal analysis of uncertainty and probability in decision-making under incomplete information
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Distinguished ambiguity (Knightian uncertainty) from risk in ways that influenced Bayesian and non-Bayesian epistemology
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Helped motivate formal study of the principle of maximum entropy as a basis for rational credence assignment under uncertainty
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