An Empirical Model of Dyadic Link Formation in a Network with Unobserved Heterogeneity
研究了一个有向链接形成模型，该模型体现同质性和互惠性，采用固定效应处理未观测的度异质性，并通过规范检验和推断评估模型对印度村庄人情网络中传递性的拟合效果。
Abstract I study a dyadic linking model in which agents form directed links that exhibit homophily and reciprocity. A fixed-effect approach accounts for unobserved sources of degree heterogeneity. I consider specification testing and inference with respect to the homophily and reciprocity parameters. The specification test compares observed transitivity to predicted transitivity. All test statistics account for the presence of an incidental parameter by using formulas based on an asymptotic approximation. In an application to favor networks in Indian villages, the specification test detects that the dyadic linking model underestimates the true transitivity of the network.