Research

Working Papers

Augmented Truncated Policy Gradients for Quickback Experiments
W. McCloskey, W. Xing, A. Badanidiyuru, E. Becker, C. Harris, S. Wager, R. Johari
CODE@MIT 2026
Deployed at Uber

Fast Access or Familiar Care? Learning-Based Capacity Allocation with Endogenous Patient Choice
W. Xing, Y. Zhang, Y. Hu

Learning to Communicate Under Alignment Uncertainty: A Bayesian Persuasion Bandit Approach
W. Xing, R. Johari
ML×OR Workshop, NeurIPS 2026
Finalist, 2026 DMDA Workshop Best Paper Competition (Theoretical Track)

Online Learning for Dynamic Service Mode Control
W. Xing, Y. Hu, A. Kalvit, V. Sarhangian
Major Revision, Operations Research
Finalist, 2026 INFORMS Service Science Best Student Paper Competition

Generalized Hypercube Queueing Models with Overlapping Service Regions
W. Xing, S. Zhu, Y. Xie
Major Revision, Service Science
First Place, Clifford Spiegelman Student Paper Competition, JSM 2026

Optimizing Server Locations in Spatial Queues: Parametric and Non-parametric Bayesian Optimization Approaches
C. Hua, A. J. Swersey, W. Xing, Y. Zhang
Major Revision, Operations Research

Attention-Limited Reward Learning
W. Xing

Publications

Estimation of Treatment Effects under Nonstationarity via the Truncated Policy Gradient Estimator [Code]
R. Johari, T. Peng, W. Xing
Under review at Stochastic Systems
ICML 2026
ML×OR Workshop, NeurIPS 2025

Conservative Inference in Switchback Experiments [Code]
J. Blanchet, P. W. Glynn, R. Johari, L. Wu, W. Xing
AISTATS 2026

Black-Box Optimization with Implicit Constraints for Public Policy [Code]
W. Xing, J. Lee, C. Liu, S. Zhu
Oral Paper, AAAI Conference on Artificial Intelligence 2025
Refereed Paper, INFORMS Optimization Society Conference 2024

Multi-Priority Patient Transfer Under Ambulance Offload Delay
W. Xing, C. Hua
Production and Operations Management 2025
Finalist, Best Student Paper Competition, POMS-China International Conference 2024
Second Place, Best Student Paper Competition, INFORMS Conference on Service Science 2021

Optimal Unit Locations in Emergency Service Systems with Bayesian Optimization
W. Xing, C. Hua
Finalist, Best Paper Competition, INFORMS Conference on Service Science 2022
Finalist, Best Student Paper Competition, POMS-HK International Conference 2022

NuSC: An Effective Local Search Algorithm for Solving the Set Covering Problem [Code]
C. Luo, W. Xing, S. Cai, C. Hu
IEEE Transactions on Cybernetics 2022

Predictive Job Scheduling under Uncertain Constraints in Cloud Computing [Code] [Blog]
H. Dong, B. Wang, B. Qiao, W. Xing, C. Luo, S. Qin, Q. Lin, D. Zhang, G. Virdi, T. Moscibroda
International Joint Conferences on Artificial Intelligence 2021
Deployed at Microsoft Azure

Correlation-Aware Heuristic Search for Intelligent Virtual Machine Provisioning in Cloud Systems [Blog]
C. Luo, B. Qiao, W. Xing, X. Chen, P. Zhao, C. Du, R. Yao, H. Zhang, W. Wu, S. Cai, B. He, S. Rajmohan, Q. Lin
AAAI Conference on Artificial Intelligence 2021
Deployed at Microsoft Azure

Packages

XP Gym (led by Andrew Zheng)
A modular, high-performance framework for A/B testing and estimator benchmarking