 | Dr. Gonzalo Muñoz Abstract: Dealing with uncertainty in optimization parameters is an important and longstanding challenge. Typically, uncertain parameters are predicted accurately, and then a deterministic optimization problem is solved. However, the decisions produced by this so-called predict-then-optimize procedure can be highly sensitive to uncertain parameters. In this work, we contribute to recent efforts in producing decision-focused predictions, i.e., to build predictive models that are constructed with the goal of minimizing a regret measure on the decisions taken with them. Specifically, we formulate the expected regret minimization as a pessimistic bilevel optimization model, refine known NP-hardness results of this problem, and present a single-level reformulation. Leveraging the single-level reformulation, we show various computational techniques to achieve empirical tractability and report extensive computational results on shortest-path and bipartite matching instances with uncertain cost vectors. Joint work with Victor Bucarey, Sophia Calderón and Frédéric Semet. |
 | Sparse Estimation: Closing the Gap Between L0 and L1 Models Dr. Alper Atamtürk, Professor, Department of Industrial Engineering & Operations Research, University of California, Berkeley Friday, September 8, 2023; 10:40 AM – 11:40 AM ET |
 | Dr. Alejandro Toriello Professor at the Department of Industrial and Systems Engineering Weil 406 |
 | Dr. Artem Prokhorov Professor of Business Analytics, University of Sydney Thursday, June 22, 2023; 10:40 AM – 11:40 AM ET |
 | Dr. Mark P. Van Oyen Professor at the Department of Industrial and Operations Engineering Friday, April 21, 2023; 10:40 AM – 11:40 AM ET |
 | Dr. Serhan Ziya Professor at the Department of Statistics and Operations Research Friday, April 14, 2023; 10:40 AM – 11:40 AM ET |
 | Dr. John Vande Vate Professor at the Department of Industrial and Systems Engineering |
 | Dr. Michele Samorani Associate Professor, Information Sciences & Analytics |
 | Dr. Varun Gupta Associate Professor of Operations Management |
 | Dr. Pinar Keskinocak William W. George Chair & Professor and Director of the Center of Health and Humanitarian Systems |
 | Dr. Ebru Bish Professor of Operations Management , Department of Information Systems, Statistics and Management Science |
 | Dr. Alan Andrew Scheller-Wolf Richard M. Cyert Professor of Operations Management |
 | Dynamic Scheduling with Bayesian Learning Dr. Xiaoshan Peng |
 | Semialgebraic parametric analysis by metaprogramming (SPAM) and its applications in optimization Dr. Yuan Zhou |
 | A Dynamic Model for Airline Fleeting and Scheduling Dr. Chiwei Yan |
 | Quantum Approaches for Combinatorial Optimization Problems Dr. Chunjing Jia Assistant Professor, Department of Physics University of Florida, Tuesday, October 25, 2022; 3:00 PM – 4:00 PM ET |
 | Optimization and Economic Equilibrium Dr. Tyrrell Rockafellar LITTLE HALL 225 |
 | A Review on Discrete Diversity of Optimization from an Operations Research Perspective Dr. Rafa Martí, Professor, Department of Statistics and Operations Research Tuesday, April 19, 2022; 4:05 PM – 4:55 PM |
 | Dynamic-Data-Driven Simulation Modeling for Resilient Microgrid Systems Dr. Nurcin Celik Friday, April 15, 2022; 11:45 AM – 12: 35 PM |
 | Approximation algorithms for a class of stochastic selection problems with reward and cost considerations Dr. Edwin Romeijn |
 | Convexification for Non-Convex Mixed-Integer Quadratic Programming Dr. Sam Burer |
 | Advances in Operations Research for Public Safety Dr. Laura Albert |
 | Interpretability, Robustness, and Fairness in Predictive and Prescriptive Analytics for Social Impact Dr. Phebe Vayanos |
 | Match, Batch, and Dispatch: Analysis of Order Fulfillment Policies Dr. Natarajan Gautam |
 | Improving Patient Safety, Patient Flow and Physician Well-being in Emergency Departments Dr. Kevin Taaffe |
 | Modeling the Operations of Domestic Sex Trafficking Networks: Transdisciplinary Research Meets Network Interdiction Dr. Thomas Sharkey |
 | Asymmetric Stochastic Shortest-Path Interdiction Favoring the Evader Dr. Cole Smith |