Twitter and citations
利用VoxEU平台上的经济学论文数据，通过工具变量法发现推特活动对论文引用次数有因果影响，至少一条推文可使引用增加16%至25%。
Social media, especially Twitter, plays an increasingly important role among researchers in showcasing and promoting their research. Does Twitter affect academic citations? Making use of Twitter activity about columns published on VoxEU, a renowned online platform for economists, we develop an instrumental variable strategy to show that Twitter activity about a research paper has a causal effect on the number of citations that this paper will receive. We find that the existence of at least one tweet, as opposed to none, increases citations by 16–25%. Doubling overall Twitter engagement boosts citations by up to 16%.