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100,000 Christian martyrs? Nov 02, 2013

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It is claimed an average of 100,000 Christians have died because of their faith every year for the past decade: and that this is an 'unreported catastrophe'. The Vatican has called it a credible number. But is it? Ruth Alexander and Wesley Stephenson report.

WS MoreOrLess: Fertility - when is too late? Oct 26, 2013

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Women in their late thirties shouldn’t be as anxious about their prospects of having a baby as is commonly assumed, psychologist Jean Twenge argues. Tim Harford finds fertility experts agree. This programme was first broadcast on the BBC World Service.

WS MoreOrLess: Nobel Prize puzzle Oct 19, 2013

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Tim Harford tells the story of how two economists who disagree with each other have been jointly awarded the Nobel Prize. Eugene Fama has shown that stock markets are efficient, while Robert Shiller has shown that they're not. Tim interviews both professors about their findings, and this apparent contradiction.

The Hawthorne Effect Oct 12, 2013

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Tim Harford tells the story of the Hawthorne Experiments, one of the most famous social studies of the Twentieth Century. The finding – that workers are more productive if they are given attention - became known as the Hawthorne Effect. And he hears how the original data are now casting doubt on the legendary results. This programme was first broadcast on the BBC World Service.

WS MoreOrLess: Mosquitoes and elephants Oct 07, 2013

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Has the mosquito killed half the people who have ever lived? Tim Harford assesses the claim. Are 96 elephants a day being killed in Africa? Plus, a return to the subject of left-handers – could it be true that they're more likely to be criminal masterminds? This programme was first broadcast on the BBC World Service.

Underage drinking Oct 04, 2013

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Are hundreds of young children visiting A&E because of alcohol? Plus, an update on the Trumptonshire economy. And has the mosquito killed half the people who have ever lived? Tim Harford presents.

WS MoreOrLess: Population explosion? Sep 30, 2013

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"We just shut our eyes to the fact that the world's population is increasing out of control." Is broadcaster and naturalist Sir David Attenborough right about global population projections? And Tim Harford wonders whether it's true that Scotland is home to 20% of the world's redheads. This programme was first broadcast on the BBC World Service.

NHS hospital deaths Sep 27, 2013

Show notes

Tim Harford examines the claim that NHS hospital patients are 45% more likely to die than US ones. Is Sir David Attenborough right that the world's population is increasingly out of control? And are 20% of the world's redheads in Scotland? Plus, the story of the Hawthorne Experiment, one of the most famous studies in industrial history.

Formula 1 racing risk Sep 23, 2013

Show notes

'I accept every time I get in my car, there's a 20% chance I could die'. It's a line from the Formula 1 hit film, Rush. Spoken by racing driver Niki Lauda's character. Formula 1 was certainly a dangerous sport during the 1970s, but was it really that dangerous? Tim Harford and Hannah Barnes look at the data. Plus, is it true that it takes 1,000 years for a plastic bag to degrade? It's a popular claim, but More or Less finds the environmental facts about plastic bags are much less certain than that statistic suggests. This edition was first broadcast on the BBC World Service.

Do free school meals work? Sep 20, 2013

Show notes

All pupils at infant schools in England are to get free school lunches from next September, but does the evidence prove free dinners improve results? 'I accept every time I get in my car, there's a 20% chance I could die' - it's a line from the Formula 1 hit film, Rush, but was it really true for 1970s racing drivers? The government wants shops to start charging for plastic bags and the Deputy Prime Minister Nick Clegg says a plastic bag takes 1,000 years to degrade, but More or Less finds the environmental facts about plastic bags are much less certain than that statistic suggests. And do the health benefits of cycling outweigh the risk of injury? Professor David Spiegelhalter goes through the numbers.

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