论文标题
根据法律的自我审查：香港国家安全法的案例研究
Self-Censorship Under Law: A Case Study of the Hong Kong National Security Law
论文作者
论文摘要
我们研究限制言论的立法如何使用最近的香港国家安全法作为案例研究来诱导在线自我审查和改变在线话语。我们从香港用户收集了700万个历史推文的数据集，并补充了其他研究人员收集的推文流的历史快照。我们比较了《国家安全法》之前和之后的在线活动，我们发现香港用户展示了两种类型的自我审查。首先，与对照组相比，香港用户更有可能从Tweet流的历史快照中随机取样，以删除过去的在线活动。具体来说，香港用户比对照组删除或限制其帐户的可能性更高，并且删除了过去的帖子的可能性超过两倍。其次，我们发现香港用户发布的关于在中国大陆社交媒体上对政治敏感的话题的发布频率较低。这种趋势继续增加。
We study how legislation that restricts speech can induce online self-censorship and alter online discourse, using the recent Hong Kong national security law as a case study. We collect a dataset of 7 million historical Tweets from Hong Kong users, supplemented with historical snapshots of Tweet streams collected by other researchers. We compare online activity before and after enactment of the national security law, and we find that Hong Kong users demonstrate two types of self-censorship. First, Hong Kong users are more likely than a control group, sampled randomly from historical snapshots of Tweet streams, to remove past online activity. Specifically, Hong Kong users are over a third more likely than the control group to delete or restrict their account and over twice as likely to delete past posts. Second, we find that Hong Kong users post less often about politically sensitive topics that have been censored on social media in mainland China. This trend continues to increase.
