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It isn't easy to type "QWERTY" on a qwerty keyboard. My left-hand little finger holds the shift key, then the other fingers of my left hand clumsily crab sideways across the upper row. Q-W-E-R-T-Y. There's a lesson here: it matters where the keys sit on your keyboard. There are good arrangements and bad ones. Many people think that qwerty is a bad one - in fact, that it was deliberately designed to be slow and awkward. Could that be true? And why do economists, of all people, argue about this? It turns out that the stakes are higher than they might first appear. FIND OUT MORE:. 50 Things That Made the Modern Economy highlights the inventions, ideas and innovations that helped create the economic world. Full story

24 April