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作者：Petersen, Niels Christian
作者单位：University of Southern Denmark
摘要：This paper is concerned with optimal directions in the directional distance function in data envelopment analysis. It is shown that the vector pointing in the direction that minimizes the Euclidean distance between the input-output vector (X-0, Y-0) and the efficient frontier, the input isoquant reflecting output Y-0, or the output isoquant reflecting input X-0 is optimal, because the corresponding vector of virtual multipliers defines the relative prices that maximize profit, cost, or revenue...
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作者：Feng, Qi; Shanthikumar, J. George
作者单位：Purdue University System; Purdue University
摘要：We study the role of bargaining in a firm's sequential selling process. The seller firm under consideration sequentially sells a fixed amount of stock to a random arrival stream of potential buyers who are heterogeneous in product valuation. Based on the stock level and the time to the end of the selling season, the seller may dynamically choose either to post a take-it-or-leave-it price or to engage in bargaining with an arriving buyer. We introduce a stochastic order, called the scaled prici...
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作者：Emadi, Seyed Morteza; Swaminathan, Jayashankar M.
作者单位：University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina School of Medicine
摘要：Designing modern call centers requires an understanding of callers' patience and abandonment behavior. Using a Cox regression analysis, we show that callers' abandonment behavior may differ based on their contact history, and changes across their different contacts. We control for caller heterogeneity using a two-step grouped-fixed effect method. This analysis shows that differences in callers' abandonment behavior are not only driven by their heterogeneity but also by differences in their bel...
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作者：Klausen, Jytte; Marks, Christopher E.; Zaman, Tauhid
作者单位：Brandeis University; Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT)
摘要：Online extremists' use of social media poses a new form of threat to the general public. These extremists range from cyberbullies to terrorist organizations. Social media providers often suspend the extremists' accounts in response to user complaints. However, extremist users can simply create new accounts and continue their activities. In this work we present a new set of operational capabilities to address the threat posed by online extremists in social networks. We use thousands of Twitter ...
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作者：Xu, Zhou; Lee, Chung-Yee
作者单位：Hong Kong Polytechnic University; Hong Kong University of Science & Technology
摘要：We study a continuous berth allocation problem, where incoming vessels need to be assigned a mooring time as well as a berth location on a quay. It is a crucial element in port planning to achieve quick turnaround time for vessels. To solve this problem, many solution methods have been developed in the literature. However, gaps between the best-known lower and upper bounds on its optimal solutions are far from close. In this paper, we propose new and more effective solution methods for this im...
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作者：Zeng, Yun; Chaintreau, Augustin; Towsley, Don; Xia, Cathy H.
作者单位：University System of Ohio; Ohio State University; Columbia University; University of Massachusetts System; University of Massachusetts Amherst
摘要：Parallel and distributed processing systems have expanded in size as technology advances in cloud computing and big data analytics. A critical issue concerns throughput scalability: whether throughput decreases to zero as the systems scale in size and capabilities. We model parallel and distributed processing systems as fork and join queueing networks with blocking (FJQN/Bs). Such networks can have arbitrary topology, arbitrary initial state, and generally distributed service times. We propose...
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作者：He, Xue Dong; Peng, Xianhua
作者单位：Chinese University of Hong Kong; Peking University; Peking University Shenzhen Graduate School (PKU Shenzhen)
摘要：The regulator is interested in proposing a capital adequacy test by specifying an acceptance set for firms' capital positions at the end of a given period. This set needs to be surplus invariant; i.e., not to depend on the surplus of firms' shareholders, because the test means to protect firms' liability holders. We prove that any surplus-invariant, law-invariant, and conic acceptance set must be the set of capital positions whose value at risk at a given level is less than zero. The result st...
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作者：Hochbaum, Dorit S.; Liu, Sheng
作者单位：University of California System; University of California Berkeley
摘要：Accurate yield prediction in integrated circuit manufacturing enables accurate estimation of production cost and early detection of processing problems. It is known that defects tend to be clustered and a chip is likely to be defective if its neighbors are defective. This neighborhood effect is not well captured in traditional yield modeling approaches. We propose a new yield prediction model, called adjacency-clustering which addresses, for the first time, the neighborhood effect, and deliver...
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作者：Ferreira, Kris Johnson; Simchi-Levi, David; Wang, He
作者单位：Harvard University; Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT); University System of Georgia; Georgia Institute of Technology
摘要：We consider a price-based network revenue management problem in which a retailer aims to maximize revenue from multiple products with limited inventory over a finite selling season. As is common in practice, we assume the demand function contains unknown parameters that must be learned from sales data. In the presence of these unknown demand parameters, the retailer faces a trade-off commonly referred to as the exploration-exploitation trade-off. Toward the beginning of the selling season, the...
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作者：Zhang, Boyu; Cao, Zhigang; Qin, Cheng-Zhong; Yang, Xiaoguang
作者单位：Beijing Normal University; Beijing Jiaotong University; University of California System; University of California Santa Barbara; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
摘要：We analyze the evolution of fashion based on a network game model. Each agent in this model is a conformist or a rebel. A conformist prefers to take the action most common among her neighboring agents, whereas a rebel prefers the opposite. When there is only one type of agents, the model possesses an exact potential function, implying that fashion cycles are unlikely to emerge in a homogeneous population. The homophily index, a measure of segregation in networks with multiple types of nodes, i...
