It is a great transformation of housing welfare measures in China based on the supply-side reform objective to reuse the stock housing as public rental housing and to replace building new ones by collecting available housing from the market.Through an empirical study on the Collecting Vacant Private Housing as Public Rental Housing program in Changzhou,this paper finds that the selected housing is relatively scattered in a city,which is beneficial for dispersing the poor and avoiding the marginalization and over-concentration of poor families that might be caused by out-relocating at a whole.However,it has resulted in poverty reconcentration in part of the old communities,probably further leading to the spatial solidification of the poor as well as the further decline of the old communities.Therefore it may not effectively solve the housing problems of the poor household population by providing this alternative public rental housing that is collected according to the economic efficiency.Accordingly,the paper argues that it is necessary to reinforce the community development and renovate the declined communities in time,for the purpose of improving housing welfare measures.%从租赁市场筹集公租房,以社会存量房源代替政府新建房源是供给侧改革目标下我国城市住房保障方式的重大转型.通过对常州市收储公祖房的实证考察,发现在城市尺度上,该做法促进了保障对象的整体分散,有助于避免统一外迁安置造成贫困人口的边缘化和过度集中.但在社区尺度上,该做法却加速了保障对象的局部再集聚,可能致使贫困人口的空间固化以及部分老旧社区的持续退化.政府基于经济效率筹集替代性公租房难以有效解决户籍贫困人口的住房困难,优化房源选择、加强社区建设和更新者旧社区将是完善该住房保障方式的必要补充.
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