ust over a fortnight ago, Matthew Robson had never worked in banking. This was mainly because he was 15 years and 7 months old and attending a comprehensive school in South London.

Today he is the talk of Tokyo, Wall Street and the City. Fund managers, CEOs and analysts are poring over his report, How Teenagers Consume Media, which he wrote last week while on work experience at Morgan Stanley.

In it he laid out the world according to the teenager: a confusing place where the PC is a radio, the games console is a telephone, the mobile telephone is a stereo and text-message machine, the DVDs are pirate copies and no one uses Twitter.

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