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PODCAST

More or Less

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

science mathematics

All Episodes

8:58

Deciding when to suspend a vaccine

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2021/03/20

Many countries recently decided to suspend the use of the AstraZeneca coronavirus vaccine over fears it was increasing the risk of blood clots. The European Medicines Agency and the WHO called on countries to continue using the vaccine but regulators in individual countries opted to be cautious, waiting for investigations to take place. But why? Tim Harford explores the risks of blood clots and weighing up whether it was necessary to suspend using the vaccine.

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8:58

The truth about obesity and Covid 19

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2021/03/13

A widely reported study claims that 90% of Covid 19 deaths across the world happened in countries with high obesity rates. While an individual’s risk of death is increased by having a high Body Mass Index, the broader effect on a country’s death rate is not what it seems.

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8:58

Sainthood and Cup draws

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2021/03/06

Tim Harford explores the chances of becoming a saint, inspired by a throw away comment by the detective on the TV drama ‘Death in Paradise.’ Plus, a listener has a question about the recent Europa League Draw for the final knockout round. He spotted that none of the teams face a rival from their own country. What were the chances of that happening?

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8:58

Why are US Covid cases falling?

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2021/02/27

Cases of Covid 19 began to soar in the US in the autumn. By early January there were around 300,000 new cases a day. But since then the numbers have fallen steeply. What caused this dramatic drop? From herd immunity to the weather, Tim Harford explores some of the theories with Derek Thompson of The Atlantic magazine and Professor Jennifer Dowd, deputy director of the Lever Hume Centre for Demographic Science at the University of Oxford.

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8:58

Covid 19 death count: which countries are faring worst?

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2021/02/20

Are different countries counting deaths from Covid 19 in the same way? Tim Harford finds out if we can trust international comparisons with the data available. We discover Peru currently has the most excess deaths per capita over the course of the pandemic, while Belgium has the highest Covid death count per capita.Tim speaks to Hannah Ritchie from Our World in Data and John Burn Murdoch, senior data visualisation journalist at the Financial Times.

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28:55

Comparing death counts, Lock Down drinking and Long...

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2021/02/17

The UK was the first European country to surpass 100,000 deaths from Covid 19. The UK has one of the worst death rates. But can we trust the numbers? Many of our listeners have asked us to investigate. Long Covid is widely acknowledged as being a growing problem, but what are the numbers involved? Just how many people have longterm symptoms after their initial infection? There have been reports that we are drinking more in Lock Down. We examine the evidence. Dr Natalie MacDermott was one of

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8:58

How much Covid in the World?

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2021/02/13

If we brought all the virus particles of the Sars-CoV-2 virus from every human currently infected, how much would there be? This was a question posed by one of our listeners. We lined up two experts to try to work this out. YouTube maths nerd Matt Parker and Kit Yates, senior lecturer in mathematical biology at the University of Bath, UK give us their best estimates. One believes the particles would fit into a small can of coke, the other a spoonful.

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28:36

Brexit exports, cladding and are 1 in 5 disabled?

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2021/02/10

Are exports to the EU from the UK down 68% since Brexit? This apocalyptic statistic is being widely reported, but does it really tell us what’s happening at Dover and Folkstone?Ministers are tweeting reassuring numbers about flammable cladding on high rise buildings. We’re not so sure.Is it really true that one in five people are disabled?Plus, if you assembled all the coronavirus particles in the world into a pile - how big would it be?

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8:58

Glasgow vs Rwanda

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2021/02/06

Tim explores a shocking claim that life expectancy in some parts of Glasgow is less than it is in Rwanda. But is that fair on Glasgow and for that matter is it fair on Rwanda? And a listener asks whether loss of smell is a strong enough symptom of Covid that it might be used to help diagnose the virus, replacing rapid testing. Presenter: Tim Harford Producer: Chloe Hadjimatheou(Left: Rwanda refugee - photo Reza. Right: Glasgow homeless man - photo Christopher Furlong / both Getty images)

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28:36

Teachers, Test & Trace and Butterflies

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2021/02/03

Prominent Labour politicians have claimed teachers are more likely to catch Covid-19, is that true?England’s Test and Trace programme has been widely criticised, has it raised its game in recent months? A ferocious row has broken out between scientists about how effective fast turnaround Lateral Flow tests are, and how they should be used. We examine the data.Plus, we examine a claim from Extinction Rebellion that British butterflies have declined by 50% since 1976.

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8:58

The Rapid Test Row

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2021/01/30

A ferocious row has broken out among scientists about new coronavirus tests. Lateral flow tests provide results within minutes and some scientists believe they are offer accurate enough results at a speed that could allow us to resume business as usual. Others think they are so poor at detecting the virus that they could pose a huge danger.In this week’s More or Less, Tim Harford looks at the evidence and what we know about these new tests.

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28:24

Deaths at Home, Supermarket Infections and the Cobra...

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2021/01/27

Since the start of the pandemic there have been many warnings that people might die not just from the coronavirus itself, but also if they didn’t seek medical help out of fear that hospitals might be dangerous. Is there any evidence that this has happened? David Spiegelhalter is on the case.The UK is in lockdown, but tens of thousands of people a day are still testing positive for Coronavirus. Where are they catching it? Grim data on drug deaths in Scotland has been called into question on social

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28:24

Deaths at home, supermarket infections and the Cobra...

More or Less ·

2021/01/27

Since the start of the pandemic there have been many warnings that people might die not just from the coronavirus itself, but also if they didn’t seek medical help out of fear that hospitals might be dangerous. Is there any evidence that this has happened? David Spiegelhalter is on the case.The UK is in lockdown, but tens of thousands of people a day are still testing positive for Coronavirus. Where are they catching it? Grim data on drug deaths in Scotland has been called into question on social

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8:58

Counting Covid’s impact on GDP

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2021/01/23

GDP figures for the period covering lockdown appear to show that the UK suffered a catastrophic decline, worse than almost any other country. But as Tim Harford finds out, things aren’t quite as bad for the UK as they might seem - though they might be worse for everywhere else. Also, alarming claims have been circulating in the UK about the number of suicides during lockdown. We look at the facts.There is support for the issues discussed in the programme at help.befrienders.orgPresenter: Tim

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27:49

Will the vaccine bring back normal life? GDP and Fishing

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2021/01/20

The vaccine rollout continues: how long will it take before we see the benefits, and what benefits will we see? Figures suggest the UK’s economy performed worse than almost anywhere else in the world during the pandemic. But are the numbers misleading us? Alarming claims have been circulating about the number of suicides during lockdown. We look at the facts. Plus, will UK fishing quotas increase two thirds in the wake of Brexit? We trawl through the data.

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29:10

How effective is one dose of the vaccine?

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2021/01/14

A lot has changed since More or Less was last on air. We give you a statistical picture of the second wave: how bad is it, and is there hope? The new vaccine regime is to delay the booster shot of the Pfizer vaccine for up to 3 months. But is the first dose 52% or 90% effective? A new virus variant is meant to be 70% more transmissible, what does that mean? Plus, one of our youngest loyal listeners has a question about her classmates names.

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8:58

Ants and Algorithms

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2021/01/09

What can ants tells us about whether something deserves to be popular? This is a question tackled in David Sumpter’s book – ‘The Ten Equations that Rule the World: And How You Can Use Them Too.’ He tells Tim Harford about some of the algorithms that you see in nature, and those harnessed by tech companies such as YouTube.

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8:58

Numbers of the year: Part two

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2021/01/08

From the economic impact of Covid 19 to the number of people who have access to soap and water, we showcase figures that tell us something about 2020. Tim Harford asks a group of numbers-minded people to take a look back on the year and think of one statistic that really stands out for them. We speak to Razia Khan, the head of research and chief economist for Africa and the Middle East at Standard Chartered; Sana Safi, presenter for BBC Pashto TV at the BBC's Afghanistan Service; and Jennifer

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8:59

Numbers of the year: Part one

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2021/01/08

Tim Harford asks a group of numbers-minded people to take a look back on the year and think of one statistic that really stands out for them. From the spread of Covid-19 to the number of songs added to Spotify this year, we showcase figures that tell us something about 2020. We speak to Oliver Johnson, professor of information theory at the University of Bristol in the UK; Anne-Marie Imafidon, creator and CEO of social enterprise Stemettes; and economist Joel Waldfogel, of the University of

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8:58

The economics of a Covid Christmas

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2020/12/19

Tim Harford asks economist Joel Waldfogel how Covid 19 could affect spending at Christmas this year. They discuss the usual bump in sales and gift giving. The author of ‘Scroogenomics’ usually argues that presents are rarely as valued by the recipient compared to something they might buy for themselves. But what should people do this year?

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