From calculating to approximating Homo sapiens clearly can’t match the infallibility of rational economic man. That much has been agreed upon since the 1950s when Herbert Simon broke rank with his fellow economists and started to study how people actually behaved, finding their rationality to be severely ‘bounded’. His findings, augmented by those of psychologists Daniel Kahneman and Amos Tversky in the 1970s, gave birth to the field now known as behavioural economics, which studies the many kinds of ‘cognitive bias’ that systematically cause humans to deviate from the ideal model of
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