So-called “pig butchering” scams take billions of dollars from people around the globe.

But do the cyber scams run from compounds in Cambodia really take an amount of money equivalent to half that country’s GDP?

We investigate how the scale of these criminal operations has been calculated.

Presenter: Tim Harford
Reporter: Tom Colls
Production coordinator: Brenda Brown
Sound mix: Andrew Garratt
Editor: Richard Vadon