How Large a Vocabulary Does Text Classification Need? A Variational Approach to Vocabulary Selection Wenhu Chen author Yu Su author Yilin Shen author Zhiyu Chen author Xifeng Yan author William Yang Wang author 2019-06 text Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers) Jill Burstein editor Christy Doran editor Thamar Solorio editor Association for Computational Linguistics Minneapolis, Minnesota conference publication chen-etal-2019-large 10.18653/v1/N19-1352 https://aclanthology.org/N19-1352/ 2019-06 3487 3497