John Kay: High quality global journalism requires investment. Please share this article with others using the link below, do not cut & paste the article. See our Ts&Cs and Copyright Policy for more detail. Email ftsales.support@ft.com to buy additional rights. http://www.ft.com/cms/s/0/bfb7e6b8-d57b-11e1-af40-00144feabdc0.html#ixzz21ZbdHFAa In 1906, the great statistician Francis Galton observed a competition to guess the weight … Continue reading The Parable of the Ox