This paper studies racial segregation in schools using data on student friendships from Add Health. I estimate an equilibrium model of friendship formation, with preferences allowing both homophily and heterophily in direct and indirect ties. I find that homophily goes beyond direct links: students also prefer racially homogeneous indirect friends, while there is heterophily in income. I simulate policies reallocating students across schools. Race-based policies have nonlinear effects on within-school segregation and other network features such as clustering and centrality. Policies increasing diversity through reallocations based on income have less impact on racial segregation.

中文翻译：

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学校取消种族隔离是否促进了多样化的互动？学校内部隔离的均衡模型

本文使用来自 Add Health 的学生友谊数据研究学校中的种族隔离。我估计了一个友谊形成的均衡模型，偏好允许直接和间接关系中的同质性和异质性。我发现同质性超越了直接联系：学生也更喜欢种族同质的间接朋友，而收入则存在异质性。我模拟了在学校之间重新分配学生的政策。基于种族的政策对校内隔离和其他网络特征（如聚类和中心性）具有非线性影响。通过基于收入的重新分配来增加多样性的政策对种族隔离的影响较小。