An influential Democrat who was also one of the world’s top-ten, highest-paid hedge fund managers last year thinks he knows which book is at the top of the White House reading list this spring: Animal Spirits, the powerful new blast of behavioural economics from Nobel prize-winner George Akerlof and Yale economist Robert Shiller.

Judging by the upbeat economic message we have been hearing from the White House, the Treasury and even the Federal Reserve over the past six weeks, that is a shrewd guess. The authors argue that “we will never really understand important economic events unless we confront the fact that their causes are largely mental in nature”. Our “ideas and feelings” about the economy are not purely a rational reaction to data and experience; they themselves are an important driver of economic growth – and decline.