BBC Radio 4 - More or Less

Are African leaders more likely to die in office?

Are African leaders more likely than their counterparts elsewhere to die in office?

Which countries over and under achieved at London 2012?

How many school playing fields have really been sold off? Presented by Tim Harford.

Is the rapid growth of high frequency trading progress or a threat to the financial system

High-frequency trading, Trumptonomics and more medalling with the Olympics.

How extraordinary was Ye Shiwen's Olympic performance? More or Less looks at the numbers.

Ye Shiwen's statistics, what's happening to homelessness, and TV's murder capital.

Would tighter gun laws lead to fewer gun deaths? Also: how Olympians have changed.

Which countries punch above and below their weight at the Olympics? With Tim Harford.

Can maths prove whether the Tour de France has clamped down on the use of banned drugs?