Hello, this is Tim Harford. Thank you for downloading more or less. This is the longer version of the program, first broadcast on Friday, the 18th of November,

and in accordance with our new regime, there is no overlap with the shorter World Service edition.

So listen to and enjoy both of them.

Hello and welcome to more or less.

We are your weekly guide to the numbers all around us in the news and in life.

This week was the Brexit vote some kind of referendum on immigration and what did the British

public think about immigrants anyway? We will get Nobel Prize winning

economist Oliver Hart into the studio and we will of course ask him about the economics of

the great British Bake-Off and of course we present the answer to last week's chocolate

muffin puzzle. But first, dementia made the news this week and here's Charlotte

McDonald to tell us more. Hello Charlotte.

Hi Tim, this is what was being reported on the BBC and ITN.

Dementia is now the leading cause of death in England and Wales.

It's overtaken heart disease.

Dementia has become the biggest single killer in England and Wales.

Dementia, including Alzheimer's, has overtaken heart disease as the leading single cause of death in England and Wales.

Those headlines sort of give the impression

that dementia must be on the rise. More people must have it and so more people are

dying from it. But loyal listeners may remember we discussed the prevalence of dementia

on the programme last year and we went to great length to explain that quite

surprisingly the proportion of older people with dementia was actually falling.

So when we heard the news this week we thought how can this be true?

...