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作者：Urrea, Gloria; Yoo, Eunae
作者单位：University of Colorado System; University of Colorado Boulder; Indiana University System; Indiana University Bloomington; IU Kelley School of Business
摘要：Online volunteering platforms allow humanitarian organizations (HOs) to recruit volunteers to work remotely on projects of varying urgency. While removing time and space constraints enables HOs to scale up their volunteer force, HOs must manage greater heterogeneity in volunteers' experience. We investigate empirically how volunteers' experience impacts two performance metrics on online volunteering platforms: project completion rate and volunteer retention. In addition, we examine the conditi...
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作者：Chaturvedi, Aadhaar
作者单位：University of Auckland
摘要：We consider a multi-item buyer's make versus buy decision. The buyer sells two substitutable products with uncertain demand. Each product requires a different item, which the buyer procures from two separate suppliers (one for each item) who offer quantity-payment contracts under asymmetric information. The buyer can make one of the items but not both. We compare the buyer's expected profit between buying both the items and making one item (and buying the other), when it can make the item at t...
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作者：Ghoshal, Abhijeet; Mookerjee, Radha; Sun, Zhen
作者单位：University of Illinois System; University of Illinois Urbana-Champaign; University of Texas System; University of Texas Dallas
摘要：Our research question is motivated by a real problem faced by an existing demand aggregator. The aggregator represents multiple advertisers, each of whom signs one of two types of contracts with the aggregator for bidding on an RTB (real-time bidding) platform. A quality contract occurs on a cost-per-impression (CPM, i.e., cost per thousand impressions) basis. The advertiser is promised a minimum number of impressions and pays a CPM that is a function of the targeting quality as measured by th...
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作者：Biggs, Max; Hariss, Rim; Perakis, Georgia
作者单位：University of Virginia; McGill University; Massachusetts Institute of Technology (MIT)
摘要：In this paper, we examine a data-driven optimization approach to making optimal decisions as evaluated by a trained random forest, where these decisions can be constrained by an arbitrary polyhedral set. We model this optimization problem as a mixed-integer linear program. We show this model can be solved to optimality efficiently using pareto-optimal Benders cuts for ensembles containing a modest number of trees. We consider a random forest approximation that consists of sampling a subset of ...
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作者：Chen, Heng; Ryan, Jennifer K.
作者单位：University of Nebraska System; University of Nebraska Lincoln
摘要：Hops are the flowers of a specialty crop that provide unique flavors to craft beer. We study a multi-year crop planning problem for a farmer who seeks to add hops production to the current production of a conventional crop. The farmer must dynamically determine the number of acres to allocate to each crop and design the terms of the forward contract under which brewers purchase the hops, considering the uncertainty of weather conditions, hops yield, hops spot market price, and conventional cro...
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作者：Li, Musen Kingsley; Sodhi, ManMohan S.; Tang, Christopher S.; Yu, Jiayi Joey
作者单位：Shanghai University; City St Georges, University of London; University of California System; University of California Los Angeles; Fudan University
摘要：The chaotic response of the US Strategic National Stockpile to COVID-19 during 2020 highlighted the inadequacy of the inventory-based approaches to disaster response. This paper examines the integration of stockpile inventory, backup capacity, and standby capability to meet the disaster-related surge in demand in the future. We present a two-period model of such an integrated system for consumable items with uncertain demand that follows a general probability distribution. Our model incorporat...
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作者：Wu, Qi; Honhon, Dorothee
作者单位：University System of Ohio; Case Western Reserve University; University of Texas System; University of Texas Dallas
摘要：Buy-one-get-one-free (BOGOF), a ubiquitous sales promotion scheme by which consumers get two items for the price of one, encourages consumers to buy and waste food. An alternative promotional scheme is one where consumers receive a coupon for a second item available for free at a later time. Our work is motivated by British supermarkets which, facing criticism from lawmakers for running BOGOF promotions on perishables, started a BOGOF Later campaign with the claim that it would reduce the amou...
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作者：Wang, Lu; Kulkarni, Vidyadhar; Zhang, Hanqin
作者单位：University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina School of Medicine; National University of Singapore
摘要：We consider an inventory system with Poisson demand arrivals arising from multiple classes. Restocking epochs are specified by a given sequence. At each epoch, we can place an order for any number of items for immediate delivery. We have to decide the inventory dispensation policy, which determines whether we should satisfy a demand, or reject it, or backlog it until the next restocking epoch. We allow class-dependent rejection and backlogging costs. We also incorporate holding costs and procu...
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作者：Xu, Xiaoyan; Sethi, Suresh P.; Chung, Sai-Ho; Choi, Tsan-Ming
作者单位：Hong Kong Polytechnic University; University of Texas System; University of Texas Dallas; University of Liverpool
摘要：The recent outbreak of Coronavirus disease 2019 (COVID-19) has posed serious threats and challenges to global supply chain management (GSCM). To survive the crisis, it is critical to rethink the proper setting of global supply chains and reform many related operational strategies. We hence attempt to reform the GSCM from both supply and demand sides considering different pandemic stages (i.e., pre, during, and post-pandemic stages). In this research paper, we combine a careful literature revie...
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作者：Saghafian, Soroush; Trichakis, Nikolaos; Zhu, Ruihao; Shih, Helen A.
作者单位：Harvard University; Massachusetts Institute of Technology (MIT); Cornell University; Harvard University; Harvard University Medical Affiliates; Massachusetts General Hospital
摘要：We study how to admit and schedule heterogeneous patients by using simple, interpretable, yet effective policies when capacity is scarce, no-show behavior is patient- and time-dependent, service duration and reward are deterministic but patient-dependent, and overtime is costly. Our work is motivated by the aforementioned operational challenges that typically face adopters of new technologies in the healthcare sector. We anchor our study on a partnership with the proton therapy center of Massa...
