On Distance and the Spatial Dimension in the Definition of Internal Migration
On Distance and the Spatial Dimension in the Definition of Internal Migration
复制标题
论境内移民定义中的距离和空间维度
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
U. Fransson
中科院分区：
文献类型：
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作者：
Thomas Niedomysl;U. Fransson
迁移通常由时间和空间维度来定义。人们普遍认为，这些方面是有问题的，可能严重扭曲对移徙的理解，但数据限制实际上阻碍了进一步的洞察。本文侧重于空间维度，其中移民通常被定义为跨越行政边界的迁移。边界通常作为迁徙距离的替代物，但这种替代物的有效性在很大程度上是未知的，这给迁徙研究带来了相当大的挑战。利用瑞典所有国内移民的数据，我们首次准确描述了实际移民距离，并调查了实际移民距离和移民定义边界之间的关系。瑞典是已知的唯一一个有足够详细移民距离的国家。更具体地说，我们考察了当移民距离不同以及使用不同类型的移民定义边界时，移民数量和移民特征是如何变化的。调查结果显示，无论使用哪种移民定义边界，短途移民的比例都相当可观，但移民差异受到的影响比预期的要小。
Migration is commonly defined by a temporal and a spatial dimension. It is generally agreed that these dimensions are problematic and could seriously distort understanding of migration, but data constraints have effectively obstructed further insights. This article focuses on the spatial dimension where migration is typically defined as movement across administrative borders. Borders usually serve as proxies for migration distance but the validity of such proxies is largely unknown, posing a considerable challenge to migration research. Using data for all internal migrants in Sweden, the only known country where migration distances are available in sufficient detail, we present the first accurate description of actual migration distances and investigate the relationship between actual migration distances and migration-defining boundaries. More specifically, we examine how the volumes of migration and the characteristics of migrants change when migration distances vary and when different types of migration-defining boundaries are employed. The findings show that notable shares of short-distance migrants are included almost regardless of which migration-defining boundary is employed, but migrant differentials are less affected than might be expected.