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Dustmann,C.and Kirchkamp,O."The Optimal Migration Duration and Activity Choice after Remigration."Journal of Development Economics,2002,67(2),pp.351 -372. 魏津生(1984)曾将迁移区分为改变户口登记常住地的人口移动和人口学意义的不改变户口登记常住地的人口流动;这种划分在其后的研究中被广泛采用(蔡昉等;2003).