SAN FRANCISCO — Daniel Kahneman, a psychologist who won a Nobel Prize in economics for his insights into how ingrained neurological biases influence decision making, died Wednesday at the age of 90.

Kahneman and his longtime collaborator Amos Tversky reshaped the field of economics, which prior to their work mostly assumed that people were “rational actors” capable of clearly evaluating choices such as which car to buy or which job to take. The pair’s research — which Kahneman…