Strong and Weak Links
指出网络经济学中许多关键问题（如信息传递、个体激励、连接投资和复杂网络结构）都与联系质量有关，但现有研究多假设联系为0-1变量。作者认为可以构建联系质量的可处理模型，并从中获得新见解。
Many of the interesting issues in the economics of networks—information transmission, individual incentives with local externalities, investments in connections, and the structure of complex networks—have to do with the quality of links between individuals entities. However, most of the research to date has assumed a one-zero formulation of connections. I argue that it is possible to write down tractable models of quality of links and that analyzing such models yields fresh insights into these issues.