论文标题
接近，相似性和友谊形成：理论和证据
Proximity, Similarity, and Friendship Formation: Theory and Evidence
论文作者
论文摘要
接近能否使友谊更加多样化？为了解决这个问题，我们提出了一个学习驱动的友谊形成模型，以研究邻近和相似性如何影响建立社会联系的可能性。该模型预测，与模型的偏好驱动版本相反，接近性比相似个体之间的友谊更多。我们在秘鲁的选择性寄宿学校中使用了一个实验，该实验会在学生之间的身体接近度中随机变化以测试这些预测。经验证据与学习模型一致：尽管社交网络通过学术成就和贫穷表现出同性恋，但接近产生了更多样化的社会联系。
Can proximity make friendships more diverse? To address this question, we propose a learning-driven friendship formation model to study how proximity and similarity influence the likelihood of forming social connections. The model predicts that proximity affects more friendships between dissimilar than similar individuals, in opposition to a preference-driven version of the model. We use an experiment at selective boarding schools in Peru that generates random variation in the physical proximity between students to test these predictions. The empirical evidence is consistent with the learning model: while social networks exhibit homophily by academic achievement and poverty, proximity generates more diverse social connections.
