The behavioral, economic, and political impact of the Internet and social media: Empirical challenges and approaches
这篇综述梳理了评估互联网和社交媒体使用对行为、经济和政治影响的实证方法，重点介绍利用外生变异和自然实验识别因果效应的研究设计、挑战与发现，适合关注数字经济学因果推断的学者参考。
Abstract This paper presents a review of empirical methods used to assess the behavioral, economic, and political outcomes of Internet and social media usage. Instead of merely surveying the various impacts of the Internet, we examine the methods adopted to identify these impacts. We describe two main approaches for establishing causal effects, each with strengths and limitations. The first approach involves searching for exogenous sources of variation in the access to fast Internet or specific content. The second approach takes the form of field or laboratory experiments. In this paper, we focus on the first approach, delving into the methodological threats, empirical design, and main findings of the most prominent studies that exploit natural or quasi‐experiments for identifying the causal impact of high‐speed Internet or specific social media. This undertaking allows us to highlight the key empirical challenges in the field of Internet and social media economics while summarizing the causal relationships that the literature has uncovered so far.