Research

• Yaqi Xie, Will Ma, Linwei Xin. VC Theory for Inventory Policies. submitted. Slides.
• Jingyuan (Angela) Yang, Linwei Xin, Yuan Zhong. Balancing Demand Spillover and Lost-Sales under Fulfillment Flexibility. Draft Available.
• Mohammad Reza Aminian, Will Ma, Linwei Xin. Real-Time Personalized Order Holding. submitted. Slides.
• Zuguang Gao, Zi (Elaine) Ling, Varun Gupta, Linwei Xin. Real-Time Omnichannel Fulfillment Optimization. submitted.
• Jingyuan (Angela) Yang, Linwei Xin. Error Noted in “Robust Contract Designs: Linear Contracts and Moral Hazard” by Yu and Kong (2020). submitted.
• Linwei Xin, Jingyuan (Angela) Yang. Asymptotic Analysis of a Remanufacturing System with Non-Identical Lead Times. submitted.
• Linwei Xin, Long He, Jagtej Bewli*, John Bowman*, Huijun Feng*, Zhiwei (Tony) Qin*. On the Performance of Tailored Base-Surge Policies: Theory and Application at Walmart.Com. permanent working paper.

  ---

• Yanyang Zhao, Xinshang Wang, Linwei Xin. Multi-Item Online Order Fulfillment in a Two-Layer Network. under minor revision at Operations Research. Slides.
• Yaqi Xie, Will Ma, Linwei Xin. The Benefits of Delay to Online Decision-Making. Management Science. Forthcoming. Slides. Presentation in Chinese.
• Chengyi Lyu, Huanan Zhang, Linwei Xin. UCB-Type Learning Algorithms with Kaplan-Meier Estimator for Lost-Sales Inventory Models with Lead Times. Operations Research. 72(4) 1317–1332, 2024.
• Yifan Feng, René Caldentey, Linwei Xin, Yuan Zhong, Bing Wang*, Haoyuan Hu*. Designing Sparse Graphs for Stochastic Matching with an Application to Middle-Mile Transportation Management. Management Science. Forthcoming. Slides.
• Xin Chen, Alexander L. Stolyar, Linwei Xin. Asymptotic Optimality of Constant-Order Policies in Joint Pricing and Inventory Control Models.  Mathematics of Operations Research. 49(1) 557–577, 2024.
• Xi Chen, Will Ma, David Simchi-Levi, Linwei Xin. Assortment Planning for Recommendations at Checkout under Inventory Constraints.  Mathematics of Operations Research. 49(1) 297–325, 2024. Slides.
  -- First Place in the 2017 CSAMSE Best Paper Award sponsored by Columbia Business School’s China Business Initiative.
• Linwei Xin, Jan A. Van Mieghem. Dual-Sourcing, Dual-Mode Dynamic Stochastic Inventory Models: A Review. Invited book chapter for Research Handbook on Inventory Management. Edward Elgar Publishing, 2023.
• Jiaxi Liu*, Shuyi Lin*,Linwei Xin, Yidong Zhang*. AI vs. Human Buyers: A Study of Alibaba's Inventory Replenishment System.  INFORMS Journal on Applied Analytics. 53(5) 372-387, 2023. Slides.
  -- Finalist for the INFORMS 2022 Daniel H. Wagner Prize.
  -- Media coverage, e.g., in Chinese.
• Linwei Xin, David A. Goldberg. Distributionally Robust Inventory Control When Demand Is a Martingale. Mathematics of Operations Research. 47(3) 2387–2414, 2022. Slides.
  -- Third Place in the 2017 CSAMSE Best Paper Award sponsored by Columbia Business School’s China Business Initiative.
• Hengle Qin*, Jun Xiao*, Dongdong Ge, Linwei Xin, Jianjun Gao, Simai He, Haodong Hu, John G. Carlsson. JD.com: Operations Research Algorithms Drive Intelligent Warehouse Robots to Work. INFORMS Journal on Applied Analytics. 52(1) 42-55, 2022.
  -- Finalist for the INFORMS 2021 Franz Edelman Award. Presentation Video.
  -- Highlighted in JD.com Q4 2020 Financial Results (Page 2). Link.
  -- Highlighted in JD Logistic's Prospectus for its Hong Kong IPO (Page 127). Link.
  -- Received extensive media coverage, e.g., in English, in Chinese.
• Linwei Xin. 1.79-Approximation Algorithms for Continuous Review Single-Sourcing Lost-Sales and Dual-Sourcing Inventory Models. Operations Research. 70(1) 111-128, 2022. Slides.
• Lai Wei, Stefanus Jasin, Linwei Xin. On a Deterministic Approximation of Inventory Systems with Sequential Service-Level Constraints. Operations Research. 69(4) 1057-1076, 2021.
• Linwei Xin. Technical Note-Understanding the Performance of Capped Base-Stock Policies in Lost-Sales Inventory Models. Operations Research. 69(1) 61-70, 2021. Slides.
• Linwei Xin, David A. Goldberg. Time (In)consistency of Multistage Distributionally Robust Inventory Models with Moment Constraints. European Journal of Operational Research. 289(3) 1127-1141, 2021. 
• Alexander Shapiro, Linwei Xin. Technical Note-Time Inconsistency of Optimal Policies of Distributionally Robust Inventory Models. Operations Research. 68(5) 1576-1584, 2020.
• Cheng Wang, Rui Gao, Feng Qiu, Jianhui Wang, Linwei Xin. Risk-Based Distributionally Robust Optimal Power Flow With Dynamic Line Rating. IEEE Transactions on Power Systems. 33(6) 6074-6086, 2018.
  -- 2020 IEEE Transactions on Power Systems Best Paper Award.
• Linwei Xin, David A. Goldberg. Asymptotic Optimality of Tailored Base-Surge Policies in Dual-Sourcing Inventory Systems. Management Science. 64(1) 437-452, 2018. Slides.
  -- Within the collection of papers awarded the INFORMS 2019 APS Best Publication.
  -- First Place in the INFORMS 2015 George E. Nicholson Student Paper Competition.
  -- Second Place in the INFORMS 2015 JFIG Paper Competition.
• Linwei Xin, David A. Goldberg. Optimality Gap of Constant-Order Policies Decays Exponentially in the Lead Time for Lost Sales Models. Operations Research. 64(6) 1556-1565, 2016. Slides.
  -- Within the collection of papers awarded the INFORMS 2019 APS Best Publication.
  -- Finalist in the INFORMS 2014 MSOM Student Paper Competition.
• Linwei Xin, Alexander Shapiro. Bounds for Nested Law Invariant Coherent Risk Measures. Operations Research Letters. 40(6) 431-435, 2012.

(Note: co-authors underlined are student collaborators; an asterisk * indicates an industrial collaborator.)

Ph.D. Thesis: New approaches to inventory control: algorithms, asymptotics and robustness.

(Please email me if you have any problem downloading my papers.)

Media Coverage:

• At the E-Commerce Warehouse, a Distribution Dilemma. Chicago Booth Review. September 03, 2024.
• How E-commerce Platforms Should Deal with Your Multiple Orders. Chicago Booth Review. June 24, 2024. Chinese Translation is here.
• Changing Roles: How and Where AI Is Transforming Jobs, and Why Others Could Be at Risk. The Interline. June 13, 2024.
• The Equation: How Researchers Worked Out the Best Algorithm for Online Orders. Chicago Booth Review. November 24, 2023.
• Why Retailers Should Reject Some Online Orders. Chicago Booth Review. September 25, 2023. Chinese Translation is here.
• Why Making Customers Wait Pays Off for Online Retailers. Chicago Booth Review. April 17, 2023. Chinese Translation is here.
• When Retail Buyers Panic, A.I. Keeps Calm. Chicago Booth Review. January 04, 2023. Chinese Translation is here.
• How to Create a Better Supply Chain. Chicago Booth Review. February 16, 2022.
• Smarter Algorithms Stop Factory Robots from Colliding. Chicago Booth Review. June 21, 2021. Chinese Translation is here.
• 2021 Franz Edelman Competition: JD.com. Resoundingly Human, INFORMS Podcast Series. March 3, 2021.
• How Online Retailers Can Fulfill Orders Better. Chicago Booth Review. October 29, 2020. Chinese Translation is here.
• Retailers: A Better Algorithm Could Increase Online Sales by 76 Percent. Chicago Booth Review. January 31, 2018.

Editorial Service:

• Associate Editor: Management Science (03/2024 - present), Operations Research (01/2024 - present), Manufacturing & Service Operations Management (01/2021 - present), Naval Research Logistics (08/2018 - present).