Hello and welcome to the intelligence on Economist Radio.

I'm your host, Jason Palmer.

Every weekday, we provide a fresh perspective on the events shaping your world.

Pity Africa's tax collectors.

Loopholes abound, and plenty of people simply dodge taxes,

believing with some reason that the well-connected can skip out too.

But governments are concluding there's just too much potential revenue there to ignore.

And what exactly is the right size for a team?

Too few and you lack ideological diversity.

Too many, and you can't hear the boss at a meeting.

We look into the sociology behind getting the number right.

But first... After competing pressure from the world's two largest superpowers,

Britain has made a contentious decision.

Yesterday, its government announced that Huawei,

a giant Chinese tech company,

would be allowed a substantial but limited role in building the country's whizzy, fifth-generation,

or 5G mobile phone networks. The decision will please Britain's network operators, who like

Huawei's low prices and expertise, but it will upset America, Britain's closest ally,

which worries that Huawei is under the influence of the Chinese government.

It all comes at a sensitive time for the so-called special relationship between Britain and the U.S.

On Friday, Britain will exit the European Union and then look to America for a favorable new trade deal.

And the decision marks a split in five eyes, an electronic spying pact with its roots in the

...