Publications

齋藤優太 (2022). オフ方策評価の基礎と動向. 人工知能, Vol.37, No.4.

学会誌

Yuta Saito, Thorsten Joachims (2022). Counterfactual Evaluation and Learning for Interactive Systems. In Proceedings of the 28th SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD).

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Yuta Saito, Thorsten Joachims (2022). Fair Ranking as Fair Division: Impact-Based Individual Fairness in Ranking. In Proceedings of the 28th SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD) (Acceptance rate=14.9%).

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Yuta Saito, Thorsten Joachims (2022). Off-Policy Evaluation for Large Action Spaces via Embeddings. In Proceedings of 39th International Conference on Machine Learning (ICML) (Acceptance rate=21.9%).

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Yuta Saito, Masahiro Nomura (2022). Towards Resolving Propensity Contradiction in Offline Recommender Learning. In Proceedings of the 31st International Joint Conference on Artificial Intelligence (IJCAI) (Acceptance rate=15%, Long Talk (top 25% of accepted papers)).

引用 arXiv

Yuta Saito, Suguru Yaginuma, Taketo Naito, Kazuhide Nakata (2022). Unbiased Recommender Learning from Biased Graded Implicit Feedback. WSDM 2022 Workshop on Decision Making for Modern Information Retrieval System.

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Haruka Kiyohara, Yuta Saito, Tatsuya Matsuhiro, Yusuke Narita, Nobuyuki Shimizu, Yasuo Yamamoto (2022). Doubly Robust Off-Policy Evaluation for Ranking Policies under the Cascade Behavior Model. In Proceedings of the 15th International Conference on Web Search and Data Mining (WSDM) (Acceptance rate=20.2%, Best Paper Runner-Up).

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神嶌 敏弘, 齋藤優太 (2022). 会議報告：The 15th ACM Conference on Recommender Systems（RecSys 2021）. 人工知能, Vol.37, No.1.

学会誌

Yuta Saito, Shunsuke Aihara, Megumi Matsutani, Yusuke Narita (2021). Open Bandit Dataset and Pipeline: Towards Realistic and Reproducible Off-Policy Evaluation. In Proceedings of the Neural Information Processing Systems (NeurIPS) Track on Datasets and Benchmarks.

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Daisuke Moriwaki, Yuta Hayakawa, Isshu Munemasa, Yuta Saito, Akira Matsui, Masashi Shibata (2021). A Real-World Implementation of Unbiased Lift-based Bidding System. In Proceedings of the 2021 IEEE International Conference on Big Data (IEEE BigData).

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Masahiro Nomura, Yuta Saito (2021). Efficient Hyperparameter Optimization under Multi-Source Covariate Shift. In Proceedings of the 30th ACM International Conference on Information and Knowledge Management (CIKM).

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Yuta Saito, Takuma Udagawa, Haruka Kiyohara, Kazuki Mogi, Yusuke Narita, Kei Tateno (2021). Evaluating the Robustness of Off-Policy Evaluation. In Proceedings of the 15th ACM Conference on Recommender Systems (RecSys).

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Yuta Saito, Thorsten Joachims (2021). Counterfactual Learning and Evaluation for Recommender Systems. In Proceedings of the 15th ACM Conference on Recommender Systems (RecSys).

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Haruka Kiyohara, Kosuke Kawakami, Yuta Saito (2021). Accelerating Offline Reinforcement Learning Application in Real-Time Bidding and Recommendation: Potential Use of Simulation. RecSys 2021 Workshop on Simulation Methods for Recommender Systems.

引用 arXiv

齋藤優太, 安井翔太 (2021). 施策デザインのための機械学習入門. 技術評論社.

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Nathan Kallus, Yuta Saito, Masatoshi Uehara (2021). Optimal Off-Policy Evaluation from Multiple Logging Policies. In Proceedings of 38th International Conference on Machine Learning (ICML).

引用 コード 会議録 arXiv

成田 悠輔, 粟飯原 俊介, 齋藤優太, 松谷 恵, 矢田 紘平 (2020). 自然実験としてのアルゴリズム：機械学習・市場設計・公共政策への統一アプローチ. RIETI Discussion Paper Series 20-J-045.

ディスカッション・ペーパー

Yuta Saito (2020). Doubly Robust Estimator for Ranking Metrics with Post-Click Conversions. In Proceedings of the 14th ACM Conference on Recommender Systems (RecSys).

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Yuta Saito, Takuma Udagawa, Kei Tateno (2020). Data-Driven Off-Policy Estimator Selection: An Application in User Marketing on An Online Content Delivery Service. RecSys 2020 Workshop on Bandit and Reinforcement Learning from User Interactions.

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Yuta Saito (2020). Unbiased Pairwise Learning from Biased Implicit Feedback. In Proceedings of the 2020 ACM SIGIR on International Conference on Theory of Information Retrieval (ICTIR).

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Daisuke Moriwaki, Yuta Hayakawa, Isshu Munemasa, Yuta Saito, Akira Matsui (2020). Unbiased lift-based bidding system. AdKDD & TargetAd 2020 Workshop (held in conjunction with KDD2020).

引用 arXiv

Yuta Saito, Gota Morishita, Shota Yasui (2020). Dual Learning Algorithm for Delayed Conversions. In Proceedings of the 43rd International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR).

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Yuta Saito, Shota Yasui (2020). Counterfactual Cross-Validation: Stable Model Selection Procedure for Causal Inference Models. In Proceedings of 37th International Conference on Machine Learning (ICML).

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Yuta Saito (2020). Asymmetric Tri-training for Debiasing Missing-Not-At-Random Explicit Feedback. In Proceedings of the 43rd International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR).

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齋藤優太 (2020). 私のブックマーク：反実仮想機械学習 (Counterfactual Machine Learning, CFML). 人工知能, Vol.35, No.4.

学会誌 ウェブ版

成田 悠輔, 粟飯原 俊介, 齋藤優太, 松谷 恵, 矢田 紘平 (2020). すべての機械学習は A/B テストである. 人工知能, Vol.35, No.4.

学会誌

Yuta Saito, Hayato Sakata, Kazuhide Nakata (2020). Cost-Effective and Stable Policy Optimization Algorithm for Uplift Modeling with Multiple Treatments. In Proceedings of the 2020 SIAM International Conference on Data Mining (SDM).

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Yuta Saito, Suguru Yaginuma, Yuta Nishino, Hayato Sakata, Kazuhide Nakata (2020). Unbiased Recommender Learning from Missing-Not-At-Random Implicit Feedback. In Proceedings of the 13th International Conference on Web Search and Data Mining (WSDM).

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Yuta Saito, Hayato Sakata, Kazuhide Nakata (2019). Doubly Robust Prediction and Evaluation Methods Improve Uplift Modeling for Observational Data. In Proceedings of the 2019 SIAM International Conference on Data Mining (SDM).

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