Gerd Gigerenzer

fast-and-frugal heuristics; ecological rationality.

Director Emeritus at the Max Planck Institute for Human Development and founder of the Harding Center for Risk Literacy. He built the 'adaptive toolbox' framework, arguing that simple heuristics exploit environmental structure to produce accurate decisions. His books, including 'Gut Feelings' and 'Rationality for Mortals', challenge the bias-and-error tradition in behavioural economics.