一种模拟方法用于空间测试迁移理论
1Nuffield College, University of Oxford, New Road, OX1 1NF, Oxford, UK. micol.morellini@nuffield.ox.ac.uk.
概括
这项研究引入了一种新的方法来评估迁移理论,通过评估它们的空间准确性,而不仅仅是解释能力. 调查结果显示,尽管目前的理论很适合,但仍难以代表现实世界的移民模式,突出了空间表示的局限性.
科学领域:
- 社会学 社会学 社会学
- 地理 地理 地理 地理.
- 经济学 经济学 经济学
背景情况:
- 迁移研究传统上将驱动因素 (影响流动的因素) 与模式 (空间组织) 分开.
- 现有的迁移理论在评估中往往优先考虑解释能力,而不是空间准确性.
- 这种差距限制了对移民动态的全面理解.
研究的目的:
- 引入和验证基于模拟的程序来评估迁移理论的空间准确性.
- 通过这种新方法,评估两种突出的迁移理论,即重力模型和迁移系统理论.
- 突出空间准确性在迁移理论评估中的重要性.
主要方法:
- 开发了一种基于模拟的程序,以基于理论预测生成合成迁移系统.
- 将合成系统与观察到的来源-目的地迁移流进行比较,以评估空间准确性.
- 将程序应用于欧洲内部移民数据 (2002-2021年).
主要成果:
- 重力模型和迁移系统理论都表现出高的解释能力,但空间准确性有限.
- 迁移系统理论在整体适合性方面表现优于重力模型.
- 两种理论都没有准确地重现关键的空间特征,如流动互惠和欧洲特定的国家移民形状.
结论:
- 强大的统计匹配并不保证在迁移理论中准确的空间表示.
- 拟议的基于模拟的程序为更完整地评估迁移理论提供了有价值的工具.
- 进一步的研究应侧重于完善理论,以更好地捕捉迁移的空间维度.
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