@inproceedings{hara-etal-2026-mean,
    title = "Why Mean Pooling Works: Quantifying Second-Order Collapse in Text Embeddings",
    author = "Hara, Tomomasa  and
      Kurita, Hiroto  and
      Imaizumi, Masaaki  and
      Inui, Kentaro  and
      Yokoi, Sho",
    editor = "Liakata, Maria  and
      Moreira, Viviane P.  and
      Zhang, Jiajun  and
      Jurgens, David",
    booktitle = "Proceedings of the 64th Annual Meeting of the {A}ssociation for {C}omputational {L}inguistics (Volume 1: Long Papers)",
    month = jul,
    year = "2026",
    address = "San Diego, California, United States",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-acl/2026.acl-long.2183/",
    pages = "47180--47201",
    ISBN = "979-8-89176-390-6"
}