Event Category: Operations Research Seminar Series

  • Sequential Pricing of Electricity

    Sequential Pricing of Electricity

    11/9/23 | 4:15pm | E51-335         Jacob Mays Assistant Professor Cornell Abstract: This talk investigates the design and analysis of price formation in wholesale electricity markets given variability, uncertainty, non-convexity, and intertemporal operating constraints. The primary goal is to develop a framework to assess the many resource participation models, reserve product definitions,…

  • UMOTEM: Upper Bounding Method for Optimizing over Tree Ensemble Models

    UMOTEM: Upper Bounding Method for Optimizing over Tree Ensemble Models

    11/2/23 | 4:15pm | E51-335         Leann Thayaparan ORC PhD Candidate 2023 ORC Best Student Paper Award Winner Abstract: Machine learning has become core to forecasting and planning. However, when decision makers are provided with trained and more complex machine learning models, often these models are difficult to then optimize over. When…

  • Index-Based Yield Protection for Smallholder Farmers

    Index-Based Yield Protection for Smallholder Farmers

    10/12/23 | 4:15pm | E51-335         Jeannette Song R. David Thomas Professor Duke Abstract: Government subsidies are common in the agricultural sector to protect farmers from unexpected losses. Two major forms of agricultural subsidies include price protection, under which farmers are subsidized when the market price is low, and yield protection, under…

  • Approximately Optimal Policies for Multi-Item Stochastic Inventory Problems

    Approximately Optimal Policies for Multi-Item Stochastic Inventory Problems

    10/5/23 | 4:15pm | E51-335         Garud Iyengar Tang Professor of Operations Columbia Abstract: We analyze an inventory system where a set of items share a limited storage capacity or inventory budget in each of T periods of the planning horizon. Demands for the different items follow a general multivariate Normal distribution…

  • New Challenges in Optimization for Ethical Decisions

    New Challenges in Optimization for Ethical Decisions

    9/28/23 | 4:15pm | E51-335         Swati Gupta Assistant Professor MIT Abstract: When someone is denied a job, offered a different price for the same goods or services, denied bail or declined a loan, intent to discriminate is often not the case. The decision system applies the same data and rules to…

  • Discrete Optimization for Adversarial Attacks on Large Language Models

    Discrete Optimization for Adversarial Attacks on Large Language Models

    9/21/23 | 4:15pm | E51-335         Zico Kolter Associate Professor Carnegie Mellon Abstract: In this talk, I’ll discuss our recent work on adversarial attacks against public large language models (LLMs), such as ChatGPT and Bard. At a high level, the attacks look for “adversarial suffix” strings that cause these models to ignore…

  • Linking Medication Errors to Supply Chain Disruptions: Evidence from Heparin Shortages Caused by Hurricane Maria

    Linking Medication Errors to Supply Chain Disruptions: Evidence from Heparin Shortages Caused by Hurricane Maria

    9/14/23 | 4:15pm | E51-335         Anita Carson Larz Anderson Professor of Management Boston University Abstract: Problem definition: Despite their frequency, there is scant research studying how substitutions in response to pharmaceutical supply chain disruptions impact medication errors in hospitals. To address this gap, we study this causal relationship using a natural…

  • Towards a Unified View of Distributional Robust Decision Making

    Towards a Unified View of Distributional Robust Decision Making

    5/11/23 | 4:15pm | E25-111         Jose Blanchet Professor of Management Science and Engineering Stanford Abstract: The objective of distributionally robust decision-making is to facilitate sound decisions under uncertain circumstances when the “training” environment (or “assumed model”) differs from the actual context in which the decision will be implemented. This is prevalent…

  • Revisiting School District Design: A Stream-based Approach

    Revisiting School District Design: A Stream-based Approach

    5/4/23 | 4:15pm | E25-111         Karen Smilowit James N. and Margie M. Krebs Professor in Industrial Engineering and Management Sciences Northwestern Abstract: Operations research methods have been used to improve operations in public school systems for over fifty years. The talk will explore connections between evolving issues in public education and…

  • Buy-Many Mechanisms: A New Perspective on Revenue-Optimal Mechanism Design

    Buy-Many Mechanisms: A New Perspective on Revenue-Optimal Mechanism Design

    4/27/23 | 4:15pm | E25-111         Shuchi Chawla Professor University of Texas Abstract: Multi-item mechanisms can be very complex offering many different bundles to the buyer that could even be randomized. Such complexity is thought to be necessary as the revenue gaps between randomized and deterministic mechanisms, or deterministic and simple mechanisms…