We’ve known for decades that the rich live longer than the poor. But it turns out the size of that gap depends on where you live. That’s the surprising finding of a new study out today. In some cities, like Los Angeles, the poor live almost as long as their wealthier counterparts. Their lives are getting longer too. Elsewhere, the trend is going in the opposite direction. The poor are living shorter and shorter lives. Why? Madeleine speaks to one of the researchers on the new study.