在地中海中部航线的搜救并没有引发迁移:预测建模以回答迁移研究中的因果查询
Alejandra Rodríguez Sánchez1, Julian Wucherpfennig2, Ramona Rischke3
1University of Potsdam, 14482, Potsdam, Germany. rodriguezs@uni-potsdam.de.
Scientific reports
|August 3, 2023
概括
国家和私人搜救行动似乎并没有增加地中海中部航线上的非法移民. 我们的分析没有发现证据表明这些努力作为一个拉动因素,与一些假设相反.
科学领域:
- *社会科学,犯罪学和政治科学
- * 移民研究和公共政策.
背景情况:
- * 假设表明,国家和私人主导的搜救行动可能通过影响移民的风险-收益计算来鼓励非法移民.
- *地中海中部路线是非法移民进入欧洲的关键和危险走廊.
研究的目的:
- * 实证地测试"引力因子"假设,涉及中地中海航线上的SAR行动.
- * 分析不同SAR干预时期 (国家主导,私人主导和利比亚海岸警卫队的反击) 对移民流动的影响.
主要方法:
- *利用贝叶斯的结构时间序列模型与因果推理技术相结合.
- * 采用机器学习,使用多种数据源构建合成反事实迁移流.
- *在三个干预期内分析过境尝试 (抵达,被推回,死亡),控制移民驱动因素.
主要成果:
- * 预测建模准确地复制了历史的移民流数据.
- *利比亚海岸警卫队协调的反击政策明显影响了移民流.
- * 无论是国家领导的还是私人领导的搜救干预都没有对越境企图的数量产生明显的影响.
结论:
- * 该研究没有发现支持搜救行动在该路线上作为非法移民驱动力的说法.
- *所采用的因果推断和机器学习方法对于迁移流预测和因果分析是有效的.
- *政策影响表明,SAR努力可能不是影响地中海中部航线上的移民决策的主要因素.
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