More Or Less: Behind The Stats

Sexual violence was widespread in Liberia’s brutal and bloody year civil war. But were three quarters of women in the country raped? We tell the story behind the number and reveal how well-meaning efforts to expose what happened have fuelled myths and miss-leading statistics that continue to be propagated to this day, including by the UN.We speak to Amelia Hoover Green from Drexel University, Dara Cohen from the Kennedy School of Government at Harvard University, researcher Phyllis Kimba and Aisha Dukule from the think tank Center For Liberia's Future in Monrovia.(Photo: Liberian women and children wait for rice rations in overcrowded Monrovia, June 2003. Credit: Georges Gobet/AFP/Getty Images)

Who voted in the US elections? Plus are there nine million stray cats in the UK?

Does the world really spend three times as much on ice cream than on humanitarian aid?

The fact-checkers have been working overtime looking into the numbers used by Donald Trump during his campaign to become President of the USA. In the wake of the election next week, we take a look at some of Trump’s more outrageous statistical claims

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

How many people die for every kilo of cocaine? More Or Less investigates.

When maths can get you locked up.

It’s now a year since the UN set its new Sustainable Development Goals to try to make the world a better place. They include 17 goals and a massive 169 targets on subjects like disease, education and governance. But some people like Bjorn Lomborg are saying that there’s just too many and they are too broad, and left like that will never achieve anything. Is he right – and is there a better way to make the world better and stop some countries lagging behind? Wesley Stephenson and Charlotte McDonald find out.

Polling on the first TV debate between Hillary Clinton and Donald Trump appears to be divided over who won it. But not all polls are equal. If the people being polled aren’t representative of the population at large, then their responses may not tell you anything useful. And when internet polls can be hijacked by online activists, they can throw up some pretty strange results.(Photo: Donald Trump and Hillary Clinton first presidential debate. Credit: Getty Images)

This week Donald Trump claimed that there are some inner city areas in the US which are suffering from the worst crime rates ever. They are so dangerous, he says, that Afghanistan is safer than many of these areas. But could this be true? We take a look at crime in the US and assess whether you can compare it to a conflict zone such as Afghanistan. (Image: Chicago - Neighbourhood residents watch as police investigate a homicide scene. Credit: Scott Olson/Getty Images)

Can economics help us work out the perfect amount to spend on a wedding gift? Our reporter Jordan Dunbar is in a tricky situation-he’s heading to an old friend’s wedding and needs to figure out how much to give as a gift without breaking the bank. Luckily, economist Maria Kozlovskaya is on hand to talk about her findings on what factors we need to consider for gift giving, as well as preserving Jordan’s friendship and wallet.

Over the last two months the Government in the Philippines has been encouraging the police to clampdown on the illegal drug trade. The new President, Rodrigo Duterte, went as far as saying that citizens could shoot and kill drug dealers who resisted arrest, and the killings of drug suspects were lawful if the police acted in self-defence. The press have been reporting numbers of how many people have been killed during the crackdown – but how much trust can we put in these figures? Lottery wins We interview Adam Kucharski, author of The Perfect Bet, to find out if maths can give you an edge to playing the lottery or gambling.

It is a commonly held belief that if women spend enough time together, their bodies start to communicate through chemical signals, known as pheromones. Eventually the women’s bodies will start to menstruate at the same time. But where does this idea come from? And is it really true? We look at the evidence and wonder – could it be down to chance?

Britons entitled to Irish passports After the Brexit vote in June, so many Britons applied for Irish passports that Ireland’s foreign minister had to ask them to stop – pointing out that the UK remains, for now, in the EU. If some of the figures that have been quoted are correct, the Irish passport service may find itself completely inundated in future. But does one in four Britons really have Irish heritage? We reveal the dubious history of that number and attempt to estimate the number of Britons who are actually entitled to dual nationality with Ireland.Do women’s periods sync? It is a commonly held belief that if women spend time together, their bodies start to sync and they will have their periods at the same time. But where does this idea come from? And is it really true? We look at the evidence and wonder – could it be down to chance?Numbers in music Marcus du Sautoy takes us on a journey through some of his favourite musical pieces, pointing out the interesting mathematical patterns hidden in the comp

Statistics suggest that officially about half of the countries in the world have abolished Capital Punishment, and a further 52 have stopped its use in practice. But we tell the story behind the numbers and show why the picture is more complicated. We speak to Parvais Jabbar, co-director of the Death Penalty Project.

The “gender pay gap” This topic has been in the news this week after the Institute for Fiscal Studies published research showing women end up 33% worse off than their male counterparts after they have children. But earlier in the summer, Fraser Nelson wrote in the Telegraph that the pay gap is “no longer an issue” for women born after 1975. Can both assessments be true? And could the label “gender pay gap” be hindering our understanding of what really lies behind the numbers?The cost of a hospital If a politician or commentator wants to underline just how wasteful a piece of expenditure is, a common strategy is to compare it to the number of hospitals you could build instead. Of course, hospitals are positive things – we all want more, right? But just how much is a hospital? Is it really a useful unit of measurement? We speak to health economist John Appleby.Corbyn Facts As Labour members begin voting on the party leadership, we investigate some of the claims made on the “Corbyn Facts” website set up by Jerem

With high profile attacks in Brussels, Nice and Munich, you might think that 2016 has been a particularly bad year for terrorism in Europe. But what happens when you put the numbers in historical context and compare them with figures for the rest of the world? More Or Less hears from Dr Erin Miller of the Global Terrorism Database and Harvard psychology professor Steven Pinker.(Image: A man wrapped in a Belgian flag holds a candle as people gather at a makeshift memorial on Place de la Bourse two days after a triple bomb attack hit. Credit: Philippe Huguen/AFP/Getty Images)

Is 2016 an unusually deadly year for terrorism?In a joint investigation with BBC Newsbeat and BBC Monitoring, we’ve analysed nearly 25,000 news articles to assess whether 2016 so far has been a unusually deadly year for terrorism. It certainly feels like it. But what do the numbers say? We estimate that, between January and July this year, 892 people died in terrorist attacks in Europe – making it the most deadly first seven months of a year since 1994. But the vast majority of those deaths have been in Turkey. The number for Western Europe is 143, which is lower than many years in the 1970s. Dying ‘at the hands of the police’This week retired footballer Dalian Atkinson died after being 'tasered' by police. His death has renewed concerns about the number of people who die after coming into contact with the police. Recently it was claimed that one person a week dies ‘at the hands of the police’ and that ‘black people are disproportionately affected.’ We take a look at the numbers.Olympic predictionsAs the Game

World Records are being set at a much faster rate in swimming than in other sports. At the Rio Olympics, British swimmer Adam Peaty managed to break the men's 100m breaststroke world record twice in two days. Tim Harford speaks to swimming coach, Rick Madge, about the reasons swimmers keep getting better results in the pool. Also, science writer Christie Aschwanden makes the case for the virtues of the 5,000 metre race. She says that in recent times it has become very popular for people to train to run a marathon. But when you look at the numbers, is the 5K a better distance? Presenter: Tim Harford Producer: Charlotte McDonald

It has been reported that Prime Minister Theresa May is planning on lifting the ban on creating new grammar schools. Chris Cook, Policy Editor for Newsnight, has been looking at the evidence for whether these selective schools improve exam performance or social mobility. Swimming World Records New world records are being set in swimming at a much faster rate than other sports – but why? Tim Harford speaks to swim coach and blogger, Rick Madge about the reason swimmers keep getting better results in the pool. Why do other sports, like athletics, not seem to have the same continual improvements in results?Teenage girls aren’t so bad after all This week’s Desk of Good News challenges the concept that teenage girls and young women are badly behaved. It features statistics on falling teenage pregnancy rates, drinking figures and improving educational success.The rise of TV Was the Queen's Coronation the event that sparked the biggest rise in TV sales ever? We take a look at the rise of television in the UK.Lottery