More or Less

Is it true that Greece failed to collect 89% of taxes in 2010? Tim Harford and the More or Less team look at the numbers behind the tax system and the other statistics used to tell the story of the Greek crisis. Which ones are home truths and which ones are myths.

Is it true that Greece failed to collect 89 per cent of taxes in 2010? Tim Harford and the More or Less team look at the numbers behind the tax system and other statistics to tell the story of the Greek crisis. Which ones are home truths and which ones are myths?

Producer:Joe Kent.

The film Jurassic World broke the record for the biggest opening weekend taking $511m. It’s a record that has been broken once already this year and most of the top ten films with the biggest opening weekends were released in the last five years. So in an age where the competition is fierce for cinemas why are these films doing so well?

Bees and the British Royal Family

Can your horoscope predict which diseases you’ll develop? And does cricket’s Duckworth-Lewis method need to evolve?

Global Footprint We’re often told that we consume so much that we need one and a half planets. It comes from the Global Footprint Network a think-tank that has pioneered ecological foot-printing but what does that number even mean, and is it helpful? Chocolate makes you thinner We tell the story behind the chocolate experiment designed to deliberately fool the press. Concerned about the amount of pseudo-science surrounding diet and nutrition, John Bohannon and Peter Onneken ran a trial and had the results published in an online journal, sent out a press release. While the results were correct the trial wasn’t very robust but this didn’t stop the story that chocolate made you thinner running in newspapers, magazines and on TV around the world. Peter and John had fooled the press and they made a documentary about it. But the experiment has sparked a debate about whether it was ethical to fool the press in this way and whether the whole project was just self-serving.

It's the last in the series so we're packing in the statistical goodies so that you can go into numerical hibernation until August. We're looking at the street value of drugs: when police claim that they've confiscated hundreds of millions of pounds worth of narcotics, where do those numbers come from? And how has the dark internet changed drug prices? We'll also be looking at claims that those of us who aren't binging on drugs are binging on biscuits instead. Apparently much of the UK and almost the entire population of Ireland is going to be obese before long. But how have such alarming forecasts fared in the past? We're often told that we consume so much that we need one and a half planets - and not just to provide room for all those obese people. What does that number even mean, and is it helpful? And Richard Thaler, the co-author of "Nudge", joins us to talk about the psychology of risk.

Tim Harford asks if the World Cup is to blame for migrant deaths in Qatar. And we solve the fiendish maths exam question that baffled students so much it became a trend on Twitter.

Tim Harford asks if the World Cup is really responsible for migrant deaths in Qatar.

On 23 May, the mathematician John Nash was killed in a car crash, alongside his wife Alicia. The couple were in their 80s. Professor Nash was on his way home from Norway after receiving the prestigious Abel prize for mathematics. He also won the Nobel memorial prize in economics in 1994, and was made famous far beyond academia when he was played by Russell Crowe in the film, A Beautiful Mind. Tim Harford takes a look back at his life with economist Peyton Young who knew Nash well. Tim also looks at how many species of owl there are. A much more difficult question to answer than you would think.

This week:

John Nash

Productivity?

What is a generation?

Animal Slaughter