Experts increasingly use social media to communicate with the wider public, prompted by the need to demonstrate impact and public engagement. While previous research on the use of social media by experts focused on single topics and performed sentiment analysis, we propose to extend the scope by investigating experts' networks, topics and communicative styles. We perform social and semantic network as well language analysis of top tweeting scientists and economists. We find that economists tweet less, mention fewer people and have fewer Twitter conversations with members of the public than scientists. Scientists use a more informal and involved style and engage wider audiences through multimedia contents, while economists use more jargon, and tend to favour traditional written media. The results point to differences in experts' communicative practices online, and we propose that disciplinary ways of 'talking' may pose obstacles to an effective public communication of expert knowledge.

中文翻译：

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Twitter 上的专家交流：比较经济学家和科学家的社交网络、主题和交流方式。

由于需要展示影响力和公众参与，专家们越来越多地使用社交媒体与更广泛的公众交流。虽然先前关于专家使用社交媒体的研究集中在单个主题并进行了情感分析，但我们建议通过调查专家的网络、主题和交流方式来扩大范围。我们对顶级推特科学家和经济学家进行社交和语义网络以及语言分析。我们发现，与科学家相比，经济学家发布的推文更少，提及的人更少，与公众的 Twitter 对话更少。科学家使用更加非正式和参与的风格，并通过多媒体内容吸引更广泛的受众，而经济学家则使用更多的行话，并倾向于偏爱传统的书面媒体。结果表明专家的差异