China's high savings phenomenon is remarkable. Since 1978,with the process of China's rapid economic growth,the level of national savings has risen dramatically,and the dependency ratio has undergone tremendous change at the same time. Therefore,exploring the link between the dependency ratio changes and national saving is an important aspect for the analysis of China's high national saving reasons. In this paper,we use the 1978-2008 time-series data and the VECM model to study the long-term dynamic relationship between the population dependency ratio change and the national savings. We find that since 1978,the total dependency ratio decline cause the increase in national savings. The total dependency ratio change has a long-term effect on national savings,its effect last about 20 years,but the major effect appeared within the first 6 years. As the total dependency ratio decline,national saving will decrease,high saving phenomenon is just temporary in China's developing process.
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