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中文摘要：
随着经济社会的快速发展,长江三角洲地区各城市之间人口分布发生了明显的变化,人口的流动和迁移正在成为长江三角洲16个城市间人口发展最为集中的矛盾点。采用密度分析、不均衡指数法、重心分析以及偏移-分享分析（shift-share analysis）等方法,分析改革开放以来长江三角洲地区人口分布演化的特征和规律,发现这一时期该区域人口分布演化呈现明显的阶段性,人口分布重心总体南移,向省市首府集中的趋势明显,人口偏移增长在不同区域层面具有明显的差异,这种人口分布演化的趋势主要受经济社会发展的驱动,同时也受到区域人口政策的影响。
英文摘要：
With the rapid economic and social development,population distribution among cities in the Changjiang River Delta has undergone significant changes.Population mobility and migration has come into being the most concentrated contradictions with respect to the population development of the cities in the Changjiang River Delta.Using the methods of density analysis,uneven index,gravity centre analysis and shift-share analysis,this paper studies the characteristics and law of the population distribution evolution in the Changjiang River Delta since the beginning of the reform and open-up of China,and furthermore, sums up to the following four points： First,the population evolution of the cities in the Changjiang River!Delta shows different characters in three periods of the year 1980-1990,1990-1997,1997-2003.In the first period,the population growth shift is very large,and population distribution is centralized quickly.In the second period,the population uneven index and the population growth shift among the cities are decreased,but the population growth shift among six great regions is increased obviously.In the third period,the population distribution among the cities is centralized,and the shift extent of the population growth is increased.Because the population growth shift among the cities in the south of the Changjiang River is higher than that among the cities in the north of the Yangtze River,the overall population distribution center moves southward.The population growth shifts among the regions on each level are different,the regions＇ level is higher,the population growth shift is lower,and the population distribution is inclined to more stable.Since 1990,on the condition of the market economy,although competition to attract the population,especially the high quality population,is very heat among the cities in the Changjiang River Delta,the difference of the population growth speeds of these cities is decreased and the centralization of population distribution comes down.Because of the variety of the pos
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