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4.5（18）
数学

Tim Harford explains - and sometimes debunks - the numbers and statistics used in political debate, the news and everyday life

16時間前

Numbers of the year 2025

We look back at some stand out numbers of 2025. How significant were Trump’s import tariffs? China sets the pace for solar power installation across the globe. We also look upwards to a particularly speedy comet - 3i Atlas. Presenter: Tim Harford Producers: Charlotte McDonald and Katie Solleveld Production Co-ordinator: Maria Ogundele Sound Mix: Rod Farquhar Editor: Richard Vadon

9分
3日前

Were there really Three Wise Men?

The surprising things we learn when we count everyone - a tour of the UK census through time. We also figure out just how many parking officers there are versus soldiers in the British army. Who really does all the housework? Plus - 20 years of ‘Freakonomics’ with Stephen Dubner. And finally - were there really three wise men who visited baby Jesus? And were they kings as the Christmas hymn would lead us to believe? Presenter: Tim Harford Reporter: Lizzy McNeil Producers: Charlotte McDonald, Nathan Gower and Katie Solleveld Production Coordinator: Maria Ogundele Sound Mix: Neil Churchill Editor: Richard Vadon

28分
12月20日

The shocking world of US health costs

A loyal listener wrote in to question this claim made by neuroscientist Dr Daniel Levitin: "Here in the US valium in a pharmacy might be $3 that same pill in a hospital setting might be $750." Our listener was shocked at how one pill can cost 250 x more in a hospital setting than in a pharmacy. But can it? Sort of. We turned to Elisabeth Rosenthal to take us on a dive into the frankly shocking world of US Health costs. Presenter: Tim Harford Producer: Lizzy McNeill Series Producer: Tom Colls Editor: Richard Vadon Production Coordinator: Maria Ogundele Sound Mix: Neil Churchill

9分
12月17日

Do we really have ‘superflu’?

The NHS is warning of an unprecedented flu season - we check what the numbers say. Is there really a mass exodus of Brits leaving the UK due to Labour tax policies? We look at the latest emigration figures. We take a look at the prison service’s curious habit of letting prisoners out early – or keeping them in for too long - is there a trend? Plus - why the US economy can’t grow at 25 percent a year. Presenter: Tim Harford Reporter: Nathan Gower Producers: Charlotte McDonald, Katie Solleveld, Lizzy McNeill and Tom Colls. Production co-ordinator: Maria Ogundele Sound mix: Gareth Jones Editor: Richard Vadon

29分
12月13日

RCP 8.5: Why did the climate change model get it wrong?

Whether we like it or not, global warming is happening. The global temperature has already gone up, and it’s going to go up more, because the atmosphere is already full of carbon dioxide and other greenhouse gases, and we’re continuing to add to that stock. Quite how much it will increase by is a very important question for all of us. Until relatively recently, during much of the 2010s and into the 2020s, many scientists claimed that if we kept on going down the path we were on, if we just kept on with business as usual, then by the end of the century global temperatures would increase by almost five degrees centigrade. This projection was based on something called RCP 8.5, a statistical scenario used by scientists to model the future of the climate. You can still find scientific papers published in 2025 that make the same claim. However, there’s a good case that RCP 8.5 should never have been used as the business-as-usual scenario. And in hindsight it doesn’t look like an accurate vision of the future at all. So what’s going on? Dr Zeke Hausfather, a climate scientist and the climate research lead at Stripe, explains the argument. Presenter: Tim Harford Series producer: Tom Colls Sound mix: Donald MacDonald Editor: Richard Vadon

9分
12月6日

Is RFK right about US sperm counts?

Around the world, many countries are concerned about tackling the decline in birth rates and total fertility rates. The US is no exception. To tackle this issue the US government announced that it would provide subsidies for Americans seeking IVF treatment. The announcement was accompanied by one suspect sounding stat from US Health Secretary Robert F. Kennedy Jr. "Today the average teenager in this country has 50% of the sperm count, 50% of the testosterone as a 65-year-old man," he said. We speak to Professor Allan Pacey, Professor of Andrology at the University of Manchester, and Adith Arun, a researcher at Yale University to find out whether this statement is accurate. Producer/Presenter: Lizzy McNeill Series Producer: Tom Colls Editor: Richard Vadon Sound Mix: James Beard

9分
11月29日

Richard Thaler and The Winner’s Curse

In the later part of the 20th century, a pioneering group of economists started shaking up their academic field. These “behavioural economists” used findings from experimental psychology and everyday life to challenge the prevailing view that human beings were rational decision makers – acting in predictable ways to maximize their wealth. One of those pioneers was Richard Thaler, who noted down some of these “anomalies” in a column in the 1980s, which was turned into a book - The Winner’s Curse - first published in 1992. His work also won him the Nobel memorial prize in economics in 2017. More than 30 years on, he has returned to that book, publishing a new, updated version with co-author Alex Imas, which looks at whether those anomalies in rational thinking have stood the test of time. Tim asks him to set out two of his most famous ideas – the winner’s curse itself, and the idea of “mental accounting”. Presenter: Tim Harford Series producer: Tom Colls Sound mix: Donald MacDonald Editor: Richard Vadon

9分
11月22日

Is there a stock market crash coming?

For months, the share prices of tech companies have marched seemingly-ever upward, driven by fevered excitement about the potential of Artificial Intelligence. But many are now voicing fears that this surge might turn out to be a bubble, which could burst with damaging effects. So do we have to rely on vibes? Or can we use data to tell us about the risk that AI might go pop? Nathan Gower discovers what the numbers tell us about the health of the stock market. Guests: Katie Martin, markets columnist at the Financial Times Simon French, Chief Economist and Head of Research at investment company Panmure Liberum Presenter and Producer: Nathan Gower Series Producer: Tom Colls Editor: Richard Vadon Sound Engineer: Andy Mills

9分

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