The rural - urban population migration is one important way to impel population urbanization development; the institutional and political factors have the important influence on it.
乡城人口迁移是推动人口城镇化发展的重要途径之一,制度政策因素对其产生重要影响。
参考来源 - 我国人口城镇化演变的制度分析与城乡关系转型Population migration increase the chance of city labor supplier, also can substitute citizens labor supplier covering about 7% only.
6人口迁移流动增加城镇劳动力供给，也对城镇本地人口劳动参与产生一定的替代作用，但替代率只有7％左右。
参考来源 - 转型时期中国城镇劳动供给影响因素研究Part One: The course of the population migration.
第一部分：人口流动迁徙的原因。
参考来源 - 春秋时期人口流动迁徙问题研究·2,447,543篇论文数据，部分数据来源于NoteExpress
It suggests that the population migration economical growth mod - el could interpret regional economical growth differences.
人口迁移的经济增长模型解释了地区间经济增长差异的原因。
These conditions are most prevalent in tropical regions; however population migration has spread these diseases to most countries.
这些病症在热带地区最为普遍；不过，随着人口迁移，这些疾病已传播到大多数国家。
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