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Could a legalised drugs industry bring in new taxes to boost the public purse? Manuela Saragosa reports from the cannabis cafes of Maastricht in the Netherlands, where foreigners have been banned from smoking marijuana.

Professor Jeff Miron of Harvard University argues that drug liberalisation could bring a substantial boost to US tax revenues.

Plus, James Srodes describes the power of innovation, with a look at the see-through headphones designed for a captive audience.

(Image: Silhouette of a woman as she smokes. Credit: Danny Lawson/PA Wire)