There’s been an upsurge in recent decades in tackling problems by trying to change the behaviour of individuals – behavioural economics, nudge theory and a proliferation of government ‘nudge units’. Now two disillusioned proponents, Nick Chater and George Loewenstein, have written an important critique of the whole thing, contrasting what they call the ‘i (individual) frame’ with the ‘s (system)

This probably doesn’t need saying, but the World Development Report is a big deal. The World Bank’s annual flagships have a track record of shaping debates on particular issues, and raising them up the endlessly churning development agenda. So it pays to pay attention. This year’s WDR, published this month, is on ‘Mind, Society and Behaviour’. I (like most people)