This article explores the relationship between school choice, student mobility and school segregation in Barcelona. The case of Barcelona is particularly interesting because the school admissions policy combines a particular design of catchment area with a significant level of choice options. We work on students and school register datasets for the school year 2016–2017 to observe the association between the socioeconomic characteristics of the students and their residential and educational geographical distribution. The article tests whether recent reforms that have undermined the role of residential proximity in admissions policy have impacted on the school segregation of three groups of socially disadvantaged students (foreign students, students entitled to Free School Meals (FSM) and students who are Recipients of Social Allowances (RSA)). We explore different patterns of mobility between socially disadvantaged and non‐disadvantaged students and the impact of opting out from neighbourhood schools on school segregation. By using a counterfactual approach that compares real enrolment with simulated school enrolment in proximity schools, we provide evidence of a significant reduction of school segregation for all socially disadvantaged students, showing the negative effects of the current high number of school choice options. In addition, our analysis shows that school choice boosts remarkably the inequality between public and private subsidised schools. The final section of the article reflects on the implications of our findings for potential reforms in the current definition of catchment areas and the overall school choice policy in Barcelona.

中文翻译：

---

（非）受控选择系统中的学生流动性和学校隔离：反事实方法

本文探讨了巴塞罗那的学校选择，学生流动性和学校隔离之间的关系。巴塞罗那的情况特别有趣，因为学校招生政策将集水区的特殊设计与大量选择选项结合在一起。我们处理2016-2017学年的学生和学校注册数据集，以观察学生的社会经济特征与其居住和教育地理分布之间的关联。该文章测试了最近破坏住所在招生政策中的作用的改革是否对三类社会弱势学生（外国学生，有资格享受免费校餐（FSM）的学生和作为社会接受者的学生）的学校隔离产生了影响津贴（RSA））。我们探索了社会弱势和非弱势学生之间的不同流动方式，以及退出邻里学校对学校隔离的影响。通过使用反事实方法，将实际入学率与邻近学校的模拟入学率进行比较，我们为所有社会弱势学生提供了明显减少学校隔离的证据，显示了当前大量学校选择的负面影响。此外，我们的分析表明，学校选择显着加剧了公立和私立学校的不平等现象。本文的最后一部分反映了我们的研究结果对当前集水区定义和巴塞罗那整体学校选择政策可能进行的改革的影响。