AI搜索摘要导致维基百科流量下降5%以上，影响显著。
Impact of AI Search Summaries on Website Traffic: Evidence from Google AI Overviews and Wikipedia
- 用谷歌AI摘要的逐步上线和多语言维基对比，评估影响。
- 英文搜索流量减少5.45%和4.82%，德法语版作对照。
- 适合关注搜索引擎变革与内容变现的研究者阅读。
搜索引擎越来越多地在自然链接上方展示AI生成的答案，可能挤占上游出版商的流量。我们利用谷歌AI摘要（AIO）的分阶段地理部署以及维基百科的多语言结构，估算其对维基百科搜索流量的影响。通过双重差分设计，比较英文维基百科文章与相同文章在德语和法语版本的外部搜索引流量，发现默认启用AIO使英文搜索流量分别下降5.45%和4.82%。结果表明，生成答案的数字中介能显著转移注意力，对内容变现、搜索平台设计及政策制定均有影响。
原文摘要 · Abstract (English)
Search engines increasingly display AI-generated answers above organic links, potentially displacing traffic to upstream publishers. We estimate the impact of Google's AI Overviews (AIO) on Wikipedia's search traffic using AIO's staggered geographic rollout and Wikipedia's multilingual structure. Our difference-in-differences design compares monthly external-search referrals to English Wikipedia articles with referrals to the same articles in German and French, and finds that default AIO availability reduced English search traffic by 5.45% and 4.82%, respectively. Our results suggest that answer-producing digital intermediaries can materially reallocate attention away from informational publishers, with implications for content monetization, search platform design, and policy.
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