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Chart of the day: silicon valleys and roundabouts

A report from Telefonica digital and Startup Genome examines the startup ecosystems in 20 cities worldwide, including London. Byt what are the simliarities and differences between Silicon Roundabout - the Old Street area in London - and Silicon Valley?

By Alex Hern

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.