My first task at Davos this year was a fun one: to interview Daniel Kahneman, the Nobel prize-winner and author of the best-selling book on the psychology of decision-making, Thinking, Fast and Slow.

One of the thoughts Mr Kahneman mooted in a lively hour of presentation and discussion was that chief executives, who are naturally optimistic people (for they would not be in that position if they weren’t), hold two sets of expectations in their heads. Read more