More or Less

The ALS ice bucket challenge has become a viral phenomenon. People around the world have been dousing themselves in ice-cold water and in the process have raised over $100m for charity. But a true nerd doesn't run with the herd, and Tim Harford is only going to do the challenge if the facts stack up. He investigates whether a viral challenge like this is good for charitable giving overall, and whether there are reasons to be more choosy about the charities we give to. This programme was first broadcast on the BBC World Service.

The ALS ice bucket challenge viral phenomenon has raised over $100m. Is this good for charitable giving overall, and should we be more choosy about the charities we give to? Plus: is there a 'rising tide' of anti-Semitism in Europe; does Shakespeare have the largest vocabulary, or is the Bard bested by hip hop’s finest; and is the current generation of young people likely to live shorter lives than their parents?

Is it true that humans use just 10% of their brains? It’s the premise of the new film Lucy, in which the brain capacity of Scarlett Johansson’s character increases to dangerous levels. Tim Harford uses considerably more than 10% of his brain to separate the neuro-science facts from the fiction with Professor Sophie Scott. What drives the price of footballers? Tim Harford tries to understand the huge transfer fees with Raffaele Poli from the CIES Football Observatory and football agent Seb Ewen. Presenter: Tim Harford Producer: Ruth Alexander This programme was first broadcast on the BBC World Service.

Media reports are suggesting that as many as 12,000 people may have Ebola in West Africa, but experts tell More or Less that's not the case. It's also said that Ebola kills up to 90% of victims, but while that's true of one outbreak, the death rate in other Ebola outbreaks has varied widely. Tim Harford and Ruth Alexander

As the Gaza conflict continues, the fact that there are estimated to be nearly three times as many men as women among the Palestinian civilian casualties has been an issue in the spotlight. Tim Harford and Ruth Alexander look at why men are often over-represented in civilian death tolls, and how the statistics in this conflict are being gathered. This programme was first broadcast on the BBC World Service.

"Revealed: half a million problem families" reported The Sunday Times. The government's expanding its Troubled Families programme - two years after More or Less found it statistically wanting. Tim Harford discusses the new numbers with BBC Newsnight's Chris Cook. Plus: CEO remuneration; deaths in Gaza; divorce risks and further adventures in the audio presentation of data.

Is anti-semitism on the rise? Ruth Alexander and James Fletcher look at the numbers, as media reports in the wake of the Gaza conflict suggest anti-semitism is a growing problem. Does the evidence support the claims? This programme was first broadcast on the BBC World Service.

The cost of the government's new student loan system is rising according to a recent report. Tim Harford investigates whether the rising costs should have been foreseen, and whether the new system will end up costing more than the old one. Plus: mobile phone goldmines in our pockets; paedophilia in the priesthood and from machine learning to deep learning.

What do we know about how deadly the Ebola virus is, and how likely is it that there might be an outbreak of the virus in the United States or Europe?

After three tragic airline incidents in eight days, is flying becoming more dangerous? Wesley Stephenson looks at the statistics behind air travel to find out? And which is the most successful nation in Commonwealth Games history? Australia, Canada, England – not even close. This programme was first broadcast on the BBC World Service.

The Pope was reported to have said that 2% of Catholic clergy were paedophiles. Is this a big number? Wesley Stephenson looks at the research on the prevalence of paedophilia and how the Catholic clergy compare to the world's population as a whole. This programme was first broadcast on the BBC World Service.

The Tour de France has reached the mountains, but what does it take to be a good climber and why are the cyclists thin and bony, while sprinters are bigger with bulging muscles? And what is the best body type to win the yellow jersey? Also are 24,000 people really killed by lightning each year? This programme was first broadcast on the BBC World Service.

In Roald Dahl’s novel "Charlie and the Chocolate Factory", Charlie Bucket wins a golden ticket to visit Willy Wonka’s factory. But one of our younger More or Less listeners in England wanted to find out what the chances would be of winning one of those Golden Tickets. So we sent maths book author Rob Eastaway to her school in Derby to explain the answer to her class-mates - a must-listen for anyone who struggles to get their head around probability. Also on the programme we look at whether the age of players makes a difference in World Cup football. This programme was first broadcast on the BBC World Service.

Obesity may mean children have a shorter lifespan than their parents, it has been claimed, but is this true? Ruth Alexander looks at the data and explores the 'Obesity Paradox' – the idea that overweight people are less likely to die than those of normal weight. She also questions whether the promise of bonuses in The World Cup has improved performances. This programme was first broadcast on the BBC World Service.

As we reach the end of the group stage are we really witnessing the greatest world cup ever? Ruth Alexander casts a sceptical eye over the statistics. She also takes a look at the possession stats to see if we’re seeing the death of tiki-taka with the help of Michael Cox from ZonalMarking.net. This programme was first broadcast on the BBC World Service.

When it comes to aid, what works best – giving people food, shelter, medicine, or just handing over cash and letting them spend it how they like? One group of researchers went to a Kenyan village to try to answer this question and to do so they also employed a new tool - randomised controlled testing. RCTs have long been the gold standard for measuring whether medical drugs work, but could they revolutionise how we measure the impact of aid?

Freakonomics guru Steven Levitt joins us to talk about an unusual experiment – getting people to agree to make major life decisions based on the toss of a coin. Is this really good social science? And what do the results tell us about decision making and happiness? And with 365 days in the year, it feels like a huge coincidence when we meet someone with the same birthday. But you only need 23 people to have a better than even chance that two will share a birthday. This counter-intuitive result is known as the birthday paradox, and the best place to look for proof is the World Cup, where 32 squads of 23 players provide an ideal data-set. Alex Bellos crunches the numbers for us. This programme was first broadcast on the BBC World Service.

"Religion Makes People More Generous"- according to The Daily Telegraph's interpretation of a new BBC poll on charitable giving. Tim Harford investigates whether there is a link between practising a religion and whether we give. Plus: Big data - the hype says it will help deliver everything from increased corporate profits to better healthcare but are we being blinded to basic statistical lessons learned over the past two hundred years? And it feels like a huge coincidence, but you only need 23 people to have a better than even chance of meeting someone with the same birthday. This is the birthday paradox, and the best place to look for proof is the World Cup, where 32 squads of 23 players provide an ideal data-set. Alex Bellos crunches the numbers for us.

Is the divorce rate in the US state of Maine linked to margarine consumption? It's one of many pairs of statistics featured on the 'Spurious Correlations' website started recently by Tyler Vigen. We talk to him about some of the funniest correlations he's found and the serious point he's trying to make. Plus: World Cup Office Sweepstake strategy. This programme was first broadcast on the BBC World Service.

Scottish independence - yes or no? Which will line your pocket more? The Scottish government says a Yes vote will leave Scots £1,000 each better off; the UK treasury says a No vote means a £1,400 bonus for Scots. More or Less looks at exactly what these claims mean, the key assumptions underlying them, and asks whether either number is likely to be accurate. Plus: the "zombie" statistic that each year 100,000 Christians are martyred around the world; getting people to agree to make major life decisions based on the toss of a coin and World Cup Office Sweepstake strategy.

Did 'rock-star' French economist Thomas Piketty get his numbers wrong? His theories about rising inequality and the increasing importance of capital have been the talk of the economic and political worlds this year. And part of their power has been the massive amount of data Piketty has brought together to back them. But the Financial Times claims to have found significant problems with Piketty's data on wealth. Tim Harford examines the FT's claims and Thomas Piketty's response. This programme was first broadcast on the BBC World Service.

Did 'rock-star' French economist Thomas Piketty get his numbers wrong? His theories about rising inequality and the increasing importance of capital have been the talk of the economic and political worlds this year. And part of their appeal has been the massive amount of data Piketty has brought together to back them. But the Financial Times claims to have found significant problems with Piketty's data on wealth, and says this undermines his claims about rising inequality. Tim Harford examines the FT's claims and Thomas Piketty's response. Plus: is as much land given over to golf courses as housing in England; is racism on the rise in Britain; and should we be concerned that several young men who have died recently were players of the video game Call of Duty?

A famous probability puzzle is discussed involving goats and game shows with German psychologist Gerd Gigerenzer. Is he right to suggest in his new book 'Risk Savvy' that we really don't understand risk and uncertainty? And More or Less listeners weigh in on a problem from last week’s programme - how old will you be before you're guaranteed to celebrate a major, round-number birthday (like 40 or 50) on a weekend?

Are the statistics put forward by UKIP accurate, and are Romanians responsible for more crime than other nationalities? Plus: Gerd Gigerenzer on the famous probability puzzle involving goats and game shows; do 24,000 people die every year from lightning strikes globally; how old will you be before you're guaranteed a round-number birthday on a weekend; and is the divorce rate in the US state of Maine linked to margarine consumption?

Did the number of people around the world living in extreme poverty fall by half a few weeks ago? That's one interpretation of newly released figures for purchasing power parity around the world. The figures compiled by the International Comparison Programme of the World Bank show that in a lot of poorer countries, things are cheaper than we had thought. One development think tank has suggested that if people in these countries can afford to buy more, fewer of them will fall under the World Bank's definition of extreme poverty. We take a look at the argument to see if it stacks up, and whether the World Bank should be lowering its estimates for global poverty in light of the new figures. This programme was first broadcast on the BBC World Service.

Does the government have lots of people chasing the relatively small amounts lost to benefits cheats, while massive amounts of tax evasion are barely investigated? Plus: did global poverty fall by half a few weeks ago; Eurovision data crunching; Willy Wonka's coveted 'Golden Tickets' and is London the 6th biggest French city?