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Tim Harford explains the numbers and statistics in the news and in life

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28/10/2016 GMT

Child Marriage and Dangerous Algorithms

BBC World Service - More or Less, Child Marriage and Dangerous Algorithms

Is a girl under 15 married every seven seconds? And beware dangerous algorithms

Is a girl under 15 married every seven seconds? And how can you protect yourself from dangerous, and often hidden, algorithms?

Is a girl under the age of 15 married every seven seconds somewhere in the world? That is what the charity Save the Children claim in their attempts to raise awareness of child marriage. But how is this figure calculated? We take a look at the difficulties with counting child brides.
 
Data scientist and activist Cathy O’Neil wants to protect you from dangerous, and often hidden, algorithms. They help make important decisions, like whether you are eligible for a loan, but they could be based on unfair statistics with hidden biases. She  talks about her new book Weapons of Math Destruction.
 
(Photo: Algorithm code. Credit: Shutterstock)

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