Next time you’re booking a hotel or a holiday and you see similar high prices across the different websites, then it’s likely you’re experiencing a collusion in pricing – created by algorithms. The internet was supposed to give power back to shoppers, forcing companies to compete to offer the lowest prices and to let shoppers easily compare retailers to find the best deal. In reality, argues Graeme McLean, pricing algorithms have learnt that the best way to maximise profits is to effectively keep all prices artificially high. And as this machine learning acts independently of human programmers, overcoming the issue will be difficult.

Carbon emissions appear to have peaked in most European countries. That’s according to a new study that found a consistent decline across 18 countries over the past decade, even when their economies continued to grow. But none of this is inevitable, warns Charlie Wilson. If those countries don’t support low carbon energy and reduce demand, the trend may reverse.

Banksy has long tolerated others copying and appropriating his art, but a recent judgement in Milan could see that about to change. As Enrico Bonadio explains, after seeking action over the sale of unauthorised merchandise it appears that the reclusive artist may be moving away from his idea that “copyright is for losers” and into a new era of legally protecting his anti-establishment works.

Post-traumatic stress disorder doesn’t just affect soldiers and first responders – an alarmingly high number of British children (one in 13) have the disorder. What’s even more concerning is that, despite being treatable, only a minority of these young people seek treatment from mental health services, says Stephanie Lewis.

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