In today's technological world we leave electronic traces wherever we go, whether shopping online or on the high street, at work or at play. That data is the raw material for a new industry of number crunchers trying to explain and influence human behaviour, as Stephen Baker explains in his new book The Numerati.

In the book, Baker meets the maths whizzes at the bleeding edge of this new way of doing business, politics, and even matchmaking.

You might be surprised at some of the things Baker's "numerati" want to know and can already find out about you. Read on for some examples taken from the book, and click here to read our full review.

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