Daniel Kahneman, Psychologist Who Upended Economics, Dies at 90

Daniel Kahneman, a psychologist whose work casting doubt on the rationality of decision-making helped spawn the field of behavioral economics and won him a Nobel Prize, has died. He was 90.

He died on Wednesday, the Washington Post reported, citing his stepdaughter, Deborah Treisman, the fiction editor for the New Yorker. No other details were available.