本文从公共品溢出的视角讨论城乡收入差距对居民福利的影响。理论模型表明,城乡收入差距的扩大并不一定导致居民福利差距的扩大。原因是随着城乡居民收入差距的扩大,城乡公共品供给数量的差距会被进一步拉大。由于城市公共品具有比农村公共品更大的溢出效应,当这种溢出提高到某一程度后,城乡居民间的福利差距反而会缩小。 This article discusses the impact of urban-rural income disparity on residents’ welfare from the perspective of public goods overflow. The theoretical model shows that the widening income gap between urban and rural areas does not necessarily lead to the widening of the residents’ welfare gap. The reason is that as the income gap between urban and rural residents widens, the gap between the supply of urban and rural public goods will be further widened. As urban public goods have a greater spillover effect than rural public goods, when the spillover reaches a certain level, the welfare gap between urban and rural residents will actually decrease.