A Guide to Formulating Fairness in an Optimization Model
Violet (Xinying) Chen, J.N. Hooker, Annals of Operations Research, 2023.
Research
Journal Articles
Combining Leximax Fairness and Efficiency in a Mathematical Programming Model
Violet (Xinying) Chen, J.N. Hooker, European Journal of Operational Research, 2022.
Conference Proceedings
Task as Context Prompting for Accurate Medical Symptom Coding Using Large Language Models,
Chengyang He, Wenlong Zhang, Violet Chen, Yue Ning, Ping Wang, Proceedings of the ACM/IEEE International Conference on Connected Health: Applications, Systems and Engineering Technologies (CHASE ’25), 2025.
Local Causal Discovery for Structural Evidence of Direct Discrimination
Jacqueline Maasch, Kyra Gan, Violet Chen, Agni Orfanoudaki, Nil-Jana Akpinar, Fei Wang, The 39th AAAI Conference on Artificial Intelligence (AAAI 2025), 2025.
Assessing Group Fairness with Social Welfare Optimization
Violet (Xinying) Chen, J.N. Hooker, Derek Leben, Integration of Constraint Programming, Artificial Intelligence, and Operations Research 21st International Conference (CPAIOR). Best Paper Award, CPAIOR 2024, 2024.
Equipping Federated Graph Neural Networks with Structure-aware Group Fairness
Nan Cui, Xiuling Wang, Wendy Hui Wang, Violet Chen, Yue Ning, 2023 IEEE International Conference on Data Mining (ICDM), 2023.
Local Justice and Machine Learning: Modeling and Inferring Dynamic Ethical Preferences toward Allocations
Violet (Xinying) Chen, Joshua Williams, Derek Leben, Hoda Heidari, Proceedings of the 37th AAAI Conference on Artificial Intelligence (AAAI 2023), 2023.
A Just Approach Balancing Rawlsian Leximax Fairness and Utilitarianism
Violet (Xinying) Chen, J.N. Hooker, 2020 AAAI/ACM Conference on AI, Ethics, and Society (AIES ’20), February 2020.
Working Papers under Revision/Review
Modeling and Learning Dynamic Moral Judgments towards Allocations in High-stakes Domains
Violet (Xinying) Chen, Joshua Williams, Derek Leben, Hoda Heidari, Major Revision, Management Science, September 2025.
End-to-End Fairness Optimization with Decision Focused Learning
Yu Wang, Violet (Xinying) Chen, Under Review, August 2025.
Manuscript available upon request
Fairness-Efficiency Symbiosis
David Rea, Violet (Xinying) Chen, Under Review, January 2026.
Manuscript available upon request
Evaluating Multidimensional Fairness in Shared Micromobility: Case Studies of Docked and Dockless Systems
Tara Zibandehkhooy, Violet (Xinying) Chen, Under Review, November 2025.
Manuscript available upon request
Ongoing Projects
Power Gap and Payment Term in Supply Chains: How Vertical and Horizontal Asymmetries Shape Fairness and Efficiency
Designing End-to-End Fairness Optimization Framework: from Theory to Practical Guidance
Equity-Centric Fair Pricing in Shared Micromobility Systems
Impact-Aware Sequential Resource Allocation