STRUCTURAL HOMOPHILY
研究了同质性（相似个体更易交往）在社交网络中的均衡结构，提出了基于网络形状识别和估计同质性偏好的新方法，并应用于友谊网络形成分析。
Homophily, or the fact that similar individuals tend to interact with each other, is a prominent feature of economic and social networks. I show that the equilibrium structure of homophily has empirical power. I build a strategic model of network formation, which produces a unique equilibrium network. Individuals have homophilic preferences and face capacity constraints on the number of links. I develop a novel empirical method, based on the shape of the equilibrium network, which allows for the identification and estimation of the underlying homophilic preferences. I apply this new methodology to the formation of friendship networks.