INFORMS 2021 Program Book

INFORMS Anaheim 2021

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administered using different modalities such as photons, protons, and carbon ions. The choice of a modality depends on its physical characteristics and its radiobiological power to damage cells. This tutorial provides a detailed account of mathematical models that utilize the ubiquitous linear-quadratic (LQ) dose- response framework to guide decisions in the fractionation and modality selection problems. The tutorial emphasizes efficient exact solution methods developed in the last five years, and touches upon diverse methodological techniques from linear, nonlinear, convex, inverse, robust, and stochastic dynamic optimization. A brief overview of work that integrates the spatial and temporal components of the problem, and also of mathematical methodology designed to adapt doses to the tumor’s observed biological condition, is included. Potential directions for future research are outlined. Since treatment decisions in this tutorial are driven by a dose-response model, it fits within a paradigm called response-guided dosing, interpreted in a broad sense. SC02 CC Ballroom B / Virtual Theater 2 Hybrid Improving Rail Share of Intermodal Freight: Roundtable Discussion Sponsored: Railway Applications Sponsored Session Chair: Bruce W. Patty, Veritec Solutions, Mill Valley, CA, 94941-3032, United States 1 - Improving Rail Share of Intermodal Freight Bruce W. Patty, Veritec Solutions, Mill Valley, CA, 94941-3032, United States This year’s Roundtable focuses on opportunities to increase the rail share of Intermodal traffic in the United States. Because of the proximity of Anaheim to two of the largest ports in the United States, additional focus will be placed on increasing the rail share of Intermodal traffic that enters the country via ports. Speakers will cover such topics as: • Improving Rail transit reliability • Use of on- dock and off-dock loading facilities • Transloading opportunities • Trade-offs between trucking and rail The Roundtable will span two sessions at the Conference. Presentations will be made during the first session and the second session will be used for an interactive session with the audience where questions can be delved into more fully than in a traditional session. 2 - Panelist Adriene Bailey, Oliver Wyman, Dallas, TX, United States 3 - Panelist Michael Leue, Alameda Corridor Transportation Authority, Long Beach, CA, United States SC03 CC Ballroom C / Virtual Theater 3 Hybrid ENRE Inaugural Harold Hotelling Medals for Lifetime Achievement Sponsored: Energy, Natural Resources and the Environment Sponsored Session Chair: Alexandra M Newman, Colorado School of Mines, Colorado School of Mines, Golden, CO, 80401-1887, United States 1 - Opening Remarks on the History of the Award Hayri Onal, University of Illinois, Urbana, IL, 61801-9015, United States 2 - Presentation of Awards Committee, Selection Process, Introductions Alexandra M. Newman, Colorado School of Mines, Golden, CO, 80401-1887, United States 3 - Award Presenter Benjamin Field Hobbs, Johns Hopkins University, Baltimore, MD, 21218, United States 4 - Award Presenter Shmuel S. Oren, University of California-Berkeley, Berkeley, CA, 95708, United States 5 - Award Presenter Andres P. Weintraub, Universidad de Chile, Santiago, 8370439, Chile 6 - Closing Remarks Miguel F. Anjos, University of Edinburgh, Edinburgh, EH9 3FD, United Kingdom

SC04 CC Ballroom D / Virtual Theater 4 Hybrid MSOM Student Paper Competition I Sponsored: Manufacturing and Service Operations Management Sponsored Session Chair: Vishal Agrawal, Georgetown University, Washington, DC, 20057, United States Chair: Dragos Florin Ciocan, INSEAD, Fontainebleau, France Chair: Yanchong (Karen) Zheng, Massachusetts Institute of Technology, Cambridge, MA, 02142-1508, United States 1 - Searching for the Best Yardstick: Cost of Quality Improvements in the U.S. Hospital Industry Jong Myeong Lim, The Wharton School, Philadelphia, PA, 19104, United States, Sergei Savin, Kenneth Moon The Hospital Value-Based Purchasing (VBP) Program is Medicare’s implementation of yardstick incentives applied to hospitals in the U.S. Under the VBP Program, 2% of all Medicare payments, estimated to be US$1.9B in FY2021, are withheld and redistributed based on relative performance in the quality of delivered care. We develop a dynamic equilibrium model in which hospitals are engaged in a repeated competition under yardstick incentives. Using structural estimation methods, we recover key parameters that govern hospitals’ decisions to invest in quality improvement, including the financial and non-financial costs and uncertain outcomes of investment. Our counterfactual analyses explore the benefits, on the one hand, of modifying the overall size of the yardstick incentives and, on the other hand, of implementing a more focused program tailored to hospital type. 2 - Optimal Pricing with a Single Point Achraf Bahamou, Columbia University, New York, NY, 10027, United States, Omar Besbes, Amine Allouah We study the following fundamental data-driven pricing problem. How can/should a decision-maker price its product based on observations at a single historical price? The decision-maker optimizes over (potentially randomized) pricing policies to maximize the worst-case ratio of the revenue she can garner compared to an oracle with full knowledge of the distribution of values when the latter is only assumed to belong to a broad non-parametric set. In particular, our framework applies to the widely used regular and monotone non-decreasing hazard rate (mhr) classes of distributions. For settings where the seller knows the exact probability of sale associated with one historical price or only a confidence interval for it, we fully characterize optimal performance and near-optimal pricing algorithms that adjust to the information at hand. The framework we develop is general and allows to characterize optimal performance for deterministic or more general randomized mechanisms, and leads to fundamental novel insights on the value of information for pricing. As examples, against mhr distributions, we show that it is possible to guarantee 85% of oracle performance if one knows that half of the customers have bought at the historical price, and if only 1% of the customers bought, it is still possible to guarantee 51% of oracle performance. 3 - How Does Telemedicine Shape Physician’s Practice in Mental Health? In this work, we study whether the adoption of telemedicine has an impact on physicians’ behavior in terms of scheduling related follow-up visits. We use a changes-in-changes (CIC) model to estimate the effect of adopting telemedicine on the length of the interval between two related visits, namely, the related visit interval (RVI). We show that physicians schedule related visits with shorter RVIs in the short term after adopting telemedicine. As a result, physicians can admit more patients to their panel. Thus, in the long run, adoption of telemedicine results in experiencing a heavier workload and scheduling related visits with longer RVIs. The adoption also affects the decision made during in-office visits with a decrease in RVI length in the short term and an increase in the long term. Also, physicians schedule more frequent follow-up visits after a telemedicine visit. Manqi Li, University of Michigan, Ann Arbor, MI, 100091, United States, Shima Nassiri, Xiang Liu, Chandy Ellimoottil

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