关键词: 流动人口, 外来人口, 暂住人口, 统计口径, 户籍制度

Abstract: The massive size of floating population is the vantage point for understanding China s post －reform developments brought by rural － to － urban migration and urbanization． Currently，the magnitude of floating population is available from several authoritative sources，including national censuses，administrative
registration records from the Ministry of Public Security and the National Population and Family Planning Commission，and large － scale samples surveys conducted by the National Bureau of Statistics． Nonetheless，the floating population is defined variously across data sources，creating inconsistency and incomparabilityproblems in terms of coverage and enumeration method and leading to different estimates of floating population size． This paper focuses on an in － depth understanding of the definitional complexities of floating population． We provide the documentation of specifics of statistical variables used by various bureaucracies to define floating population． We argue that the definitional complexities have originated from Chinese administrative settings in the administration of floating population． The complexities are also affected by different paces of socioeconomic reforms across regions．

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