as the American economist George Akerlof, who shared the Nobel Prize in Economics in 2001, said: ‘Our marginal products are not ours alone’71–they are the fruits of a cumulative process of learning and investment. Collective value creation entails a risk-taking public sector–and yet the usual relationship between risks and rewards, as taught in economics classes, does not seem to apply. So the crucial question is not just about accounting for government value but also rewarding it: how should rewards from investment be divided between the public and private sectors?