OVER THE past two decades people across the world have seen digital services transform the economy and their lives. Taxis, films, novels, noodles, doctors and dog-walkers can all be summoned with a tap of a screen. Giant firms in retailing, carmaking and the media have been humbled by new competitors.

OVER THE past two decades people across the world have seen digital services transform the economy and their lives. Taxis, films, novels, noodles, doctors and dog-walkers can all be summoned with a tap of a screen. Giant firms in retailing, carmaking and the media have been humbled by new competitors.