内生信息下的社会学习与同质性的抵消效应
Social Learning with Endogenous Information and the Countervailing Effects of Homophily
AI总结：
研究同质性如何通过影响信息内生质量与多样性，在稀疏网络中阻碍学习，在密集网络中促进学习。
摘要：
人们通过观察朋友的经验来学习机会和行动。我们建模了同质性——与相似他人交往的倾向——如何影响决策者可获得信息的内生质量和多样性。同质性提供了更高质量的信息，因为观察另一个人的收益越相似，对决策者越有信息量。然而，同质性可能导致人们采取产生较少信息的行动。我们展示了网络连通性如何影响信息内生数量与质量之间的权衡。尽管同质性在稀疏网络中阻碍学习，但在足够密集的网络中它促进学习。
英文摘要：
People learn about opportunities and actions by observing the experiences of their friends. We model how homophily -- the tendency to associate with similar others -- affects both the endogenous quality and diversity of the information accessible to decision makers. Homophily provides higher-quality information, since observing the payoffs of another person is more informative the more similar that person is to the decision maker. However, homophily can lead people to take actions that generate less information. We show how network connectivity influences the tradeoff between the endogenous quantity and quality of information. Although homophily hampers learning in sparse networks, it enhances learning in sufficiently dense networks.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
