Does the average American have fewer than three friends?

Tim Harford is here to sprinkle a refreshing shower of statistical insight over the parched lawns of misinformation.

This week, we try to unpick the confusion over a claim made by London Mayor Sadiq Khan about the contribution skilled immigrants make to the nation?s finances.

Mark Zuckerberg says that the average American has fewer than 3 friends. Is he right?

Two doctors claim that up to 90% of Alzheimer?s disease can be prevented. Are they wrong?

And Tim interviews an American, Catholic, philosopher of religion called Robert Prevost. Is he the pope?

If you?ve seen a number in the news you think we should look at, email the team ? [email protected]

More or Less is produced in partnership with the Open University.

Presenter: Tim Harford

Reporter: Lizzy McNeill

Producers: Nicholas Barrett and Nathan Gower

Series producer: Tom Colls

Production co-ordinator: Brenda Brown

Sound mix: Nigel Appleton

Editor: Richard Vadon