Will there be just six grandchildren for every 100 South Koreans?

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An article on the UK’s Telegraph newspaper website claimed that there would be just 6 grandchildren for every 100 South Koreans today. We ask whether that figure is correct and look at why South Korea’s birth rate has fallen to one of the lowest in the world, with the help of author and mathematician Rob Eastaway and journalist and author Hawon Jung. Presenter: Tim Harford Producers: Bethan Ashmead Latham, Jon Bithrey Editor: Richard Vadon Production Co-ordinator: Brenda Brown Sound Engineer: James Beard (Children wearing traditional costume wave national flags during a celebration in Seoul, South Korea. Credit: Chung Sung-Jun/Getty Images)