Prof Piff at a crossing
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Are drivers of luxury cars less likely to stop for pedestrians?

Can money make you mean? Social psychologist Prof Paul Piff illustrates one of his experiments looking at which drivers are more likely to stop for pedestrians - the rich or the poor.

In this Los Angeles neighbourhood there is no shortage of upmarket vehicles to demonstrate his theory.

In previous experiments, Prof Piff has shown that the more expensive the car, the less likely it is to stop at a pedestrian crossing - despite being legally obliged to do so.

Listen to Discovery: Can money make you mean? on BBC World Service on Monday 16 March at 19:30 GMT or Catch up via iPlayer

For more on the BBC's A Richer World, go to - or join the discussion on Twitter #BBCRicherWorld