A recent survey in the US by the organization Common Sense Media reveals a paradox, but one that is perfectly understandable. Children in poor American households today not only watch more TV than children in wealthy households, but are also more likely to have a television in their room.
美国媒体常识组织最近的调查揭示了一个看似矛盾，却很好理解的现象。今天，美国贫穷家庭的孩子不但比富裕家庭的孩子多看电视，而且他们的房子里都会放一台电视。当一种商品的消费随着收入的上升而下降时，经济学家称其为“次优”品。