需求的收入弹性 在经济学中,指衡量一种财货的需求对消费者收入变化的反应程度[1]。低档商品需求的收入弹性为负值,即如果收入增加,对起需求则会随之减少。
低档商品、必需品和奢侈品中,收入弹性为零者为收入中性物(中性财),收入弹性为负的财货定义为低档商品,收入弹性为正的物品定义为正常物品。
参考资料
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