Black Friday Fever Hits Shoppers

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Violence breaks out in the US and UK and websites struggle to cope as Black Friday fever grips shoppers. We ask a behavioural psychologist exactly what prompts us to act in this way. Meanwhile, Walmart staff in the US stage a massive Black Friday strike. Plus, we discuss the new lift technology that could take elevators to another level. We explore the so-called 'sharing economy' in the Netherlands - a website where thousands of people sign up to let people borrow everyday items like a drill or ladder. And, as the teaser trailer for the new Star Wars movie premieres, we ask how crucial the latest instalment is to the continued success of an already huge brand franchise. We are joined throughout the programme by Robert Miliken, Australia correspondent for The Economist, in Sydney.