4期

最新文章

• Managing a Noncooperative Supply Chain with Limited Capacity AI翻译
  作者：Parker, Rodney P.; Kapuscinski, Roman
  作者单位：University of Chicago; University of Michigan System; University of Michigan
  摘要：We consider a two-stage serial supply chain with capacity limits, where each installation is operated by managers attempting to minimize their own costs. A multiple-period model is necessitated by the multiple stages, capacity limits, stochastic demand, and the explicit consideration of inventories. With appropriate salvage value functions, a Markov equilibrium policy is found. Intuitive profit dominance allows for existence of a unique equilibrium solution, which is shown to be a modified ech...
• Efficient Nested Simulation for Estimating the Variance of a Conditional Expectation AI翻译
  作者：Sun, Yunpeng; Apley, Daniel W.; Staum, Jeremy
  作者单位：Northwestern University
  摘要：In a two-level nested simulation, an outer level of simulation samples scenarios, while the inner level uses simulation to estimate a conditional expectation given the scenario. Applications include financial risk management, assessing the effects of simulation input uncertainty, and computing the expected value of gathering more information in decision theory. We show that an ANOVA-like estimator of the variance of the conditional expectation is unbiased under mild conditions, and we discuss ...
• Identifying Good Nursing Levels: A Queuing Approach AI翻译
  作者：Yankovic, Natalia; Green, Linda V.
  作者单位：Columbia University
  摘要：Nursing care is arguably the single biggest factor in both the cost of hospital care and patient satisfaction. Inadequate inpatient nursing levels have also been cited as a significant factor in medical errors and emergency room overcrowding. Yet, there is widespread dissatisfaction with the current methods of determining nurse staffing levels, including the most common one of using minimum nurse-to-patient ratios. In this paper, we represent the nursing system as a variable finite-source queu...
• Dynamic Pricing of Limited Inventories When Customers Negotiate AI翻译
  作者：Kuo, Chia-Wei; Ahn, Hyun-Soo; Aydin, Goeker
  作者单位：National Taiwan University; University of Michigan System; University of Michigan; Indiana University System; IU Kelley School of Business; Indiana University Bloomington
  摘要：Although take-it-or-leave-it pricing is the main mode of operation for many retailers, a number of retailers discreetly allow price negotiation when some haggle-prone customers ask for a bargain. At these retailers, the posted price, which itself is subject to dynamic adjustments in response to the pace of sales during the selling season, serves two important roles: (i) it is the take-it-or-leave-it price to many customers who do not bargain, and (ii) it is the price from which haggle-prone cu...
• Tight Bounds for Some Risk Measures, with Applications to Robust Portfolio Selection AI翻译
  作者：Chen, Li; He, Simai; Zhang, Shuzhong
  作者单位：Chinese University of Hong Kong; City University of Hong Kong; University of Minnesota System; University of Minnesota Twin Cities
  摘要：In this paper we develop tight bounds on the expected values of several risk measures that are of interest to us. This work is motivated by the robust optimization models arising from portfolio selection problems. Indeed, the whole paper is centered around robust portfolio models and solutions. The basic setting is to find a portfolio that maximizes (respectively, minimizes) the expected utility (respectively, disutility) values in the midst of infinitely many possible ambiguous distributions ...
• Purchasing Under Asymmetric Demand and Cost Information: When Is More Private Information Better? AI翻译
  作者：Kostamis, Dimitris; Duenyas, Izak
  作者单位：University of North Carolina; University of North Carolina Chapel Hill; University of Michigan System; University of Michigan
  摘要：We study a supply chain consisting of one supplier and one OEM (original equipment manufacturer). The OEM faces stochastic demand for a final product that requires assembly of two major components, one of which is procured exclusively from the supplier. In the absence of competition, the supplier is able to make a take-it-or-leave-it offer to the OEM in the form of a menu of price-quantity contracts. The OEM possesses private information across two dimensions: (1) demand forecasts about the fi...
• Procurement Strategies with Unreliable Suppliers AI翻译
  作者：Federgruen, Awi; Yang, Nan
  作者单位：Columbia University; Washington University (WUSTL)
  摘要：We propose and analyze a general periodic-review model in which the firm has access to a set of potential suppliers, each with specific yield and price characteristics. Assuming that unsatisfied demand is backlogged, the firm incurs three types of costs: (i) procurement costs, (ii) inventory-carrying costs for units carried over from one period to the next, and (iii) backlogging costs. A procurement strategy requires the specification, in each period, of (i) the set of suppliers to be retained...
• Inventory Systems with a Generalized Cost Model AI翻译
  作者：Huh, Woonghee Tim; Janakiraman, Ganesh; Muharremoglu, Alp; Sheopuri, Anshul
  作者单位：University of British Columbia; University of Texas System; University of Texas Dallas; Columbia University; International Business Machines (IBM); IBM USA
  摘要：We study a single-stage inventory system with a generalized shortage penalty cost that includes the following three components: (i) a cost that is an increasing function of the number of backordered units in a period, (ii) a fixed cost incurred for each period in which there is a backorder irrespective of how many units are backordered, and finally (iii) a cost that is an increasing function of the number of periods a customer is backordered. We show the problem can be transformed into one in ...