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New innovations can drive economies. But where do new ideas come from? Business Daily visits a musician and inventor, Roland Lamb, who claims to have reimagined the traditional piano keyboard, called the Seaboard. Do new ideas come about through small steps, or giant leaps? The presenter of the More Or Less programme, Tim Harford, explores some of these ideas. And how do you go about selling an idea that is completely new? Our regular commentator, Bright Simons, explores the risks and rewards of innovation in Africa.