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Why is data on grooming gangs so bad?

More or Less: behind the statistics

Wednesday, 25 June 2025 - 29 minutes

Tim Harford looks at some of the numbers in the news and in life. In this episode:Why is the data on the ethnicity of grooming gangs of such poor quality?Iran has apparently enriched uranium to 60%, but what does that number mean?Adam Curtis’s latest series, Shifty, includes claims about Margaret Thatcher’s rise to power. We ask Sir John Curtice, polling king of election night, if they’re accurate.And we ask an economist to explain why being pillaged by a Viking might be more lucrative than you’d imagine.If you’ve seen a number in the news you think needs a stern look, email the team: moreorless@bbc.co.ukMore or Less is produced in partnership with the Open University.Presenter: Tim Harford
Reporter: Josephine Casserly
Producers: Nicholas Barrett, Lizzy McNeill and David Verry
Series producer: Tom Colls
Production coordinator: Brenda Brown
Sound Mix: Gareth Jones
Editor: Richard Vadon

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