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The ageing coefficient is selected as the index to evaluate population ageing, and some methods are proposed for analyzing differences in regional population ageing from temporal and spatial perspectives. China is used as the case study over the period 1998–2014. The concentration degree of the elderly varies regionally, but fluctuations in regional population ageing remain relatively stable. The coefficient of variation of population ageing fluctuates with an overall decreasing tendency. Population ageing in China exhibits a ladder-like distribution different from the distribution corresponding to economic strength. Spatial autocorrelation in population ageing is observed, with a comparatively steady spatial pattern.
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