这篇论文用14,419本亚马逊自出版小说数据，证明AI书虽然卖得少但正抢走顶级排名，让每本书收入下降。非AI书在AI泛滥的类别里最受伤。想了解AI怎么靠量碾压市场的可以看。
一篇研究分析了2023至2026年间亚马逊上14,419本自出版类型小说的全文本AI检测结果，发现超过25%内容由AI生成的书籍占目录很大比例，但销售份额较小。然而，这些AI书籍正逐步占据更多顶级排名，销售数量季度增长19.2倍，收入仅增长8.9倍，导致每本书平均收入下降。在AI渗透率高的类别中，非AI书籍失去最多市场，尤其是Kindle Unlimited可用的领域。研究认为生成式AI通过规模而非质量重塑创意市场。
Generative AI floods and dilutes the market for books
Generative AI can produce book-length works of fiction at near-zero cost. These books are often dismissed as low-quality ``slop'' that buyers will ignore, and are assumed to carry little commercial weight. We test that assumption with full-text AI detection across 14,419 self-published genre-fiction books sold on Amazon from 2023 to 2026, matched to daily sales records through June 2026. None of these books disclose whether or not they contain AI-produced content. We find that books for which we detected substantial AI text ($>$ 25\%) make up a large share of the catalog but a smaller share of sales. Even so, they reach commercial scale, winning a growing share of sales over time and taking more of the scarce top-rank positions once held by books with no detected AI text. Over this period, the number of books with observed sales in a quarter grew 19.2-fold, while quarterly revenue grew only 8.9-fold. The market therefore added selling books faster than it added revenue, and revenue per selling book fell across most genres. Books with no AI text lose the most ground in genres with high AI diffusion, and most of all where Kindle Unlimited availability is high. Among top-selling books, those with substantial AI text draw on more distinctive language from existing books than do books with no AI text; for these books overlap rises with revenue, a gradient we do not detect for books with no AI text. Generative AI can thus reshape a creative market through scale rather than quality. Our results bear directly on the market-effect question at the center of the fair use defense to copyright infringement.