-
作者：Xuan Vinh Doan; Tri-Dung Nguyen
作者单位：University of Warwick; University of Southampton
摘要：In classical newsvendor games, vendors collaborate to serve their aggregate demand whose joint distribution is assumed known with certainty. We investigate a new class of newsvendor games with ambiguity in the joint demand distributions, which is represented by a Frechet class of distributions with some, possibly overlapping, marginal information. To model this new class of games, we use ideas from distributionally robust optimization to handle distributional ambiguity and study the robust new...
-
作者：Ata, Baris; Peng, Xiaoshan
作者单位：University of Chicago; Indiana University System; Indiana University Bloomington; IU Kelley School of Business
摘要：This paper studies the callback option as an instrument to effectively mitigate congestion due to temporary surges in arrivals to a call center. The call arrival process can be an arbitrary point process, allowing uncertainty and temporary surges in the arrival rate, provided that the system is stable. When a customer arrives, the call center manager examines the system state and decides whether to offer the incoming customer the callback option. When the callback option is offered, the custom...
-
作者：Ebert, Sebastian
作者单位：Frankfurt School Finance & Management; Tilburg University
摘要：This article gives a comprehensive treatment of preferences regarding time risk-the risk of something happening sooner or later-within the expected discounted utility model. We characterize the signs of the discount function's derivatives of all orders and show how these signs are decisive for time risk preferences. We introduce the notions of prudent and temperate discounting and illustrate their importance for economic behavior. Several applications in which an important event is only a matt...
-
作者：Katehakis, Michael N.; Yang, Jian; Zhou, Tingting
作者单位：Rutgers University System; Rutgers University New Brunswick; Rutgers University Newark; College of Charleston
摘要：We study adaptive policies that handle dynamic inventory and price controls when the random demand for discrete nonperishable items is unknown. Pure inventory control is achieved by targeting newsvendor ordering quantities that correspond to empirical demand distributions learned over time. On this basis we conduct the more complex joint inventory-price control, where demand-affecting prices await to be evaluated as well. We identify policies that strive to balance between exploration and expl...
-
作者：Sainathan, Arvind
作者单位：Nanyang Technological University
摘要：Time is often used as a differentiating factor in several service operations contexts by service providers (SPs) who prioritize their customers. We use a three-stage game to investigate the competition between two SPs providing service with relatively low utilization to impatient and patient customers. In the first stage, the SPs decide whether to offer single service in which customers are seen on a first-come-first-serve basis or differentiated service with prioritization. In the second stag...
-
作者：Bu, Jinzhi; Gong, Xiting; Yao, Dacheng
作者单位：Massachusetts Institute of Technology (MIT); Chinese University of Hong Kong; Chinese Academy of Sciences; Academy of Mathematics & System Sciences, CAS
摘要：We consider an infinite-horizon lost-sales inventory model where the supply takes positive lead times and is a random function of the order quantity (e.g., random yield/capacity). The optimal policy for this model is computationally intractable, and no heuristic has been proposed in the literature. In this paper, we focus on a simple class of constant-order policies (COPs) that place the same order in every period regardless of the system state. Under some assumptions on the random supply func...
-
作者：Rajapakshe, Tharanga; Kumar, Subodha; Sen, Arun; Sriskandarajah, Chelliah
作者单位：State University System of Florida; University of Florida; Pennsylvania Commonwealth System of Higher Education (PCSHE); Temple University; Texas A&M University System; Texas A&M University College Station; Mays Business School
摘要：Healthcare information exchanges (HIEs) facilitate the electronic transfer of healthcare information among healthcare organizations. Several studies have shown that HIEs have the potential of saving billions of dollars per year and significantly improving healthcare delivery. Despite this economic benefit, financial sustainability is still a key challenge for many HIEs. Even though the issue of HIE sustainability is very important, it has not been analyzed rigorously. Hence the focus of our wo...
-
作者：Bienkowski, Marcin; Bohm, Martin; Byrka, Jaroslaw; Chrobak, Marek; Durr, Christoph; Folwarczn, Lukas; Jez, Lukasz; Sgall, Jiri; Nguyen Kim Thang; Vesely, Pavel
作者单位：University of Wroclaw; University of Bremen; Charles University Prague; University of California System; University of California Riverside; Sorbonne Universite; Centre National de la Recherche Scientifique (CNRS); Czech Academy of Sciences; Institute of Mathematics of the Czech Academy of Sciences; Universite Paris Saclay; Universite Paris Cite; University of Warwick
摘要：In the multilevel aggregation problem (MLAP), requests arrive at the nodes of an edge-weighted tree J and have to be served eventually. A service is defined as a subtree X of J that contains the root of J. This subtree X serves all requests that are pending in the nodes of X, and the cost of this service is equal to the total weight of X. Each request also incurs waiting cost between its arrival and service times. The objective is to minimize the total waiting cost of all requests plus the tot...
-
作者：Mintz, Yonatan; Aswani, Anil; Kaminsky, Philip; Flowers, Elena; Fukuoka, Yoshimi
作者单位：University System of Georgia; Georgia Institute of Technology; University of California System; University of California Berkeley; University of California System; University of California San Francisco; University of California System; University of California San Francisco
摘要：Many settings involve sequential decision making where a set of actions can be chosen at each time step, each action provides a stochastic reward, and the distribution for the reward provided by each action is initially unknown. However, frequent selection of a specific action may reduce the expected reward for that action, whereas abstaining from choosing an action may cause its expected reward to increase. Such nonstationary phenomena are observed in many real-world settings such as personal...
-
作者：Dong, Jing; Ibrahim, Rouba
作者单位：Columbia University; University of London; University College London
摘要：There are different workforce models in the gig economy. Although some ondemand service providers rely strictly on either traditional employees or independent contractors, others rely on a blended workforce, which melds a layer of contingent workers with a core of permanent employees. In deciding on the right number of right people to staff at the right time, managers must appropriately weigh the pertinent tradeoffs. In this paper, we study cost-minimizing staffing decisions in service systems...
