【摘要】 美国人口密度相对较小 ,自然增长缓慢 ,机械变动大 ,外来人口补充了其劳动力资源。 90年代以来 ,美国国内的人口迁移呈下降趋势 ,迁移规律表现为 :1 向西部、向南部向阳光地带流动 ;2 向大都市区流动 ;3 由城市向市郊转移 ,向乡间转移。其迁移规律表现为 :短距离迁移者多 ,租房户迁移多 ,2 0 - 30岁的年轻人迁移者多。形成这一态势的原因有三 :市场结构性的变化、经济利益的驱动和文化生态因素更多还原

【Abstract】 In the United States, there is low population density, slow natural increase rate, large migration stream. Immigration complements its labor resources . America internal migration gradually declines after 90th. The internal migration characteristics include : (1) flow to the western, the southern and the sunny terrain, (2) flow to metropolises, and (3) flow from urban to suburban and rural. The other characteristics include more short distance migration, more rent house migrates, and more 20-30 young person migrates. The main reasons to produce these characteristics are market structure changes, economic benefits and culture ecological factors.更多还原