Reports that Swedes are reducing the working day to just six hours may have been exaggerated but there have been trials in Sweden to test whether you can shorten people’s working hours without having an effect on output. Tim Harford investigates.

What drives some people to take the law into their own hands? Mike Williams hears stories from Europe, Africa and the US about the men – and it is usually men – who take it upon themselves to patrol the streets or seek out paedophiles online. And, he explores what happens when vigilante groups mutate into monsters. Whether motivated by revenge, frustration or a desire to do good, does mob justice ever work?

One of the most successful and long lasting memes of 2016 was Harambe the gorilla who was shot in a zoo in America. How did this particular animal gain such cultural relevance to the online world?

(Photo: A business man carries a black briefcase)