Two years ago I looked into The Economist’s global subscription pricing structure and found a labyrinthine mess that seemed irrational and unfair. For exactly the same digital content, delivered over the internet, prices varied by over 300% depending on the subscriber’s nationality. Subscribers in poor nations like Pakistan and Burundi were paying double the rate of rich nations like Canada and South Korea.This inversion was not systematic. Indians had the cheapest subscription, while a Pakistan...