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作者：Caliskan-Demirag, Ozgun; Chen, Youhua (Frank); Yang, Yi
作者单位：Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; City University of Hong Kong; Zhejiang University
摘要：We consider a stochastic periodic-review inventory control system in which the fixed cost depends on the order quantity. In particular, we investigate the optimal ordering policies under three fixed cost structures. The first structure is motivated by transportation and production contracts and considers two fixed costs: if the order size is within a specified limit C, then the fixed cost is K-1; otherwise, it is K-2, where K-1 <= K-2. The second structure contains multiple fixed costs in whic...
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作者：Jacobson, Evin Uzun; Argon, Nilay Tanik; Ziya, Serhan
作者单位：Imperial College London; University of North Carolina; University of North Carolina Chapel Hill
摘要：In the aftermath of mass-casualty events, key resources (such as ambulances and operating rooms) can be overwhelmed by the sudden jump in patient demand. To ration these resources, patients are assigned different priority levels, a process that is called triage. According to triage protocols in place, each patient's priority level is determined based on that patient's injuries only. However, recent work from the emergency medicine literature suggests that when determining priorities, resource ...
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作者：Reed, Josh; Tezcan, Tolga
作者单位：New York University; University of Rochester
摘要：We Obtain a heavy traffic limit for the GI/M/n + GI queue, which includes the entire patience time distribution. Our main approach is to scale the hazard rate function of the patience time distribution in such a way that our resulting diffusion approximation contains the entire hazard rate function. We then show through numerical studies that for various performance measures, our approximations tend to outperform those commonly used in practice. The robustness of our results is also demonstrat...
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作者：Yaman, Hande; Karasan, Oya Ekin; Kara, Bahar Y.
作者单位：Ihsan Dogramaci Bilkent University
摘要：Inspired by a real-life problem faced by one of the largest ground-based cargo companies of Turkey, the current study introduces a new facet to the hub location literature. The release time scheduling and hub location problem aims to select a specified number of hubs from a fixed set of demand centers, to allocate each demand center to a hub, and to decide on the release times of trucks from each demand center in such a way that the total amount of cargo guaranteed to be delivered to every pot...
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作者：Candogan, Ozan; Bimpikis, Kostas; Ozdaglar, Asuman
作者单位：Massachusetts Institute of Technology (MIT); Stanford University
摘要：We study the optimal pricing strategies of a monopolist selling a divisible good (service) to consumers who are embedded in a social network. A key feature of our model is that consumers experience a (positive) local network effect. In particular, each consumer's usage level depends directly on the usage of her neighbors in the social network structure. Thus, the monopolist's optimal pricing strategy may involve offering discounts to certain agents who have a central position in the underlying...
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作者：Akan, Mustafa; Alagoz, Oguzhan; Ata, Baris; Erenay, Fatih Safa; Said, Adnan
作者单位：Carnegie Mellon University; University of Wisconsin System; University of Wisconsin Madison; Northwestern University; University of Waterloo; University of Wisconsin System; University of Wisconsin Madison
摘要：We consider the problem of designing an efficient system for allocating donated livers to patients waiting for transplantation. The trade-off between medical urgency and efficiency is at the heart of the liver allocation problem. We model the transplant waiting list as a multiclass fluid model of overloaded queues, which captures the disease evolution by allowing the patients to switch between classes, i.e., health levels. We consider the bicriteria objective of minimizing total number of pati...
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作者：Ulu, Canan; Honhon, Dorothee; Alptekinoglu, Aydin
作者单位：University of Texas System; University of Texas Austin; Eindhoven University of Technology; Southern Methodist University
摘要：How should a firm modify its product assortment over time when learning about consumer tastes? In this paper, we study dynamic assortment decisions in a horizontally differentiated product category for which consumers' diverse tastes can be represented as locations on a Hotel ling line. We presume that the firm knows all possible consumer locations, comprising a finite set, but does not know their probability distribution. We model this problem as a discrete-time dynamic program; each period, ...
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作者：Hu, Jian; Mehrotra, Sanjay
作者单位：Northwestern University
摘要：We introduce and study a family of models for multiexpert multiobjective/criteria decision making. These models use a concept of weight robustness to generate a risk-averse decision. In particular, the multiexpert multicriteria robust weighted sum approach (McRow) introduced in this paper identifies a (robust) Pareto decision that minimizes the worst-case weighted sum of objectives over a given weight region. The corresponding objective value, called the robust value of a decision, is shown to...
