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Available for over a year

Helen Lewis meets people offering radical solutions to the big problems of our times. Science journalist Ehsan Masood, author of GDP: the World's Most Powerful Formula and Why It Must Now Change. explains what he thinks is wrong with Gross Domestic Product as a measure of a country's economic success. He tells Helen what alternatives are on offer - and how he thinks GDP can and should be radically reformed. Producer: Phil Tinline