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11.
A network approach to modeling the multi-echelon spare-part inventory system with backorders and interval-valued demand 总被引:4,自引:0,他引:4
Eugene Levner Yael Perlman T.C.E. Cheng Ilya Levner 《International Journal of Production Economics》2011,132(1):43-51
A multi-echelon inventory system implies the existence of a hierarchy of stocking locations, and the dependence and interaction between them. We consider a multi-echelon, spare-part inventory management problem with outsourcing and backordering. The problem is characterized by deterministic repair time/cost, and supply and demand that lie within prescribed intervals and that vary over time. The objective is to minimize the total inventory and transportation costs. We develop a network model for problem analysis and present a network flow algorithm for solving the problem. We prove that the Wagner-Whitin property, known for the lot-sizing problem, can be extended to the spare-part inventory management problem under study. 相似文献
12.
The focus of this paper is characterized by (1) an examination of the factors related to the “anticipation” of potential innovations in any organizational setting and (2) the identification of strategies for the diffusion and implementation of operations research/management science (OR/MS) techniques in a particular developing region. Based on the methodology used in studying change (innovation) in health care systems, a managerial innovation model incorporating four main components [the executive, the organization, the task environment of the organization and change agent(s), including the OR/MS manager and outside consultants] is developed and examined in terms of data obtained from top executives and other managers in forty industrial firms in Cali, Colombia. In the model developed the process of innovation is decomposed into the levels of; (a) attitudes and motivations of the executive, (b) “readiness” to take action, (c) action characteristics, (d) triggering cues and (e) actions taken and evaluation (feedback loop). The model was found useful for providing predictions indicating areas to which intervention and “marketing” of OR/MS strategies should be devoted. Overall, the study provides a base for comparative and longitudinal studies. 相似文献
13.
14.
Harrison Hong Ilan Kremer Jeffrey D. Kubik Jianping Mei Michael Moses 《The Rand journal of economics》2015,46(1):186-216
We estimate the effect of ordering by value on revenues in sequential art auctions held by Sotheby's and Christie's. We exploit a pre determined rotation of which of these two houses holds their auction first during auction week in New York City. When the house that goes first has relatively expensive paintings compared to the other house, we find that the sale premium for the week is around 21% higher relative to the mean sale premium, and the fraction of paintings sold during the week is around 11% higher. We provide evidence that this is due to an anchoring effect. 相似文献
15.
Controls on capital inflows have been experiencing a renaissance since 2008, with several prominent emerging markets implementing them in recent years. We focus on Brazil, which instituted five changes in its capital account regime in 2008–2011. Using the synthetic control method, we construct counterfactuals (i.e., Brazil with no policy change) for each of these changes. We find no evidence that any tightening of controls was effective in reducing the magnitudes of capital inflows, but we observe some modest and short-lived success in preventing further declines in inflows when the capital controls were relaxed. We hypothesize that price-based capital controls’ only perceptible effect is to be found in the content of the signal they broadcast regarding the government’s larger intentions and sensibilities. In the case of Brazil, its left-of-center government’s willingness to remove controls was perceived as a noteworthy indication that the government was not as hostile to the international financial markets as many expected it to be. 相似文献
16.
This article stresses the need for today's multinational firms to adopt their own political risk‐assessment and risk‐mitigation strategies. A comparative study of the energy, financial, and automobile sectors illustrates the need for all companies in these sectors to undertake comprehensive risk‐assessment strategies. Risk‐assessment models established by leading multinationals like British Petroleum, Bank of America, and General Motors are examined as examples that other companies in these sectors can build upon. The consistent micropolitical risk variables then lead to a proposed practical framework for examining sector‐specific micropolitical risk. © 2006 Wiley Periodicals, Inc. 相似文献
17.
Ilan Salomon Lecturer Meira Salomon Director 《Technological Forecasting and Social Change》1984,25(1):15-28
Available telecommunication technology enables the substitution of commuting by “telecommuting”, or working at home, for a wide range of white collar occupations. Research on the potential of this phenomenon along with some ongoing experiments point at an array of social and personal benefits that may be realized by this working arrangement. An assessment of the possible implications of work-at-home on the individual employee indicate that the burden on him or her may be greater than the benefits accrued and, therefore, the journey to work may be a more desirable act than traditionally perceived by transportation planners. This paper focuses on two aspects of the work-at-home arrangement. Previous research on the sociology of work as well as preliminary empirical results indicate that 1) social interaction at work and 2) the need to separate home and work roles are important elements for the individual worker. The fact that work-at-home will affect these attributes, is likely to discourage wide-scale transition to this arrangement, despite the availability of the technology. Most research published to date on the subject is qualitative in nature, as only little empirical evidence is available. The objective of this paper is to stress, based on a wide literature review, the need for a thorough behavioral evaluation of the available technology to provide a sound basis for decision making on implementation of the technology. 相似文献
18.
Prior work has examined how, in the pursuit of long‐term goals, past goal behavior influences present goal choices. Instead, the present work focuses on how anticipating future goal behavior, specifically future goal‐inconsistent behavior, influences present goal choices. For example, how anticipating overspending on an upcoming vacation influences current spending behavior. The authors propose that the effect of anticipated goal‐inconsistent behavior on present goal choice is moderated by the perceived changeability of the future behavior. When future goal‐inconsistent behavior is perceived as changeable, consumers tend to imagine it away, and it has no systematic effect on present goal choices. However, when future goal‐inconsistent behavior is perceived as unchangeable, consumers accept it as a matter of fact, and systematic effects occur. Specifically, some consumers not only fail to buffer against future goal‐inconsistent behavior's negative consequences, but tend to exacerbate those consequences by increasing their goal‐inconsistent behavior in the present. Four studies examine this surprising behavior, using an individual difference (the response‐to‐failure scale) to identify when and for whom it occurs. The studies demonstrate the role of perceived changeability using various manipulations across multiple critical goal domains such as spending, eating, and academics. 相似文献
19.
We investigate the consequences of natural disasters on operating firms in Vietnam, and find evidence of adverse effects of disasters on retail sales accompanied by increases in firm investment of very similar magnitude. There are important spatial differences, with the post‐disaster increase in investment unique to the largest cities and provinces with large urban concentrations. We find that more remote rural areas, especially in the North, experience declines in firm sales without the mitigating boost to investment in the disasters’ aftermath. The decline in firms’ sales does not appear to be associated with declines in household incomes in those regions. 相似文献
20.
The process by which product availability triggers purchase 总被引:1,自引:0,他引:1
Both product availability and lack of availability have the potential to trigger the intention to buy. The present research aims to identify the specific processes by which the latter situation of lack of availability drives purchase intention. The research demonstrates that, when lack of product availability is perceived positively, it influences purchase intentions via consumer involvement. However, when lack of product availability is perceived negatively, it influences purchase intentions via perceived feasibility, irrespective of consumer involvement. Two studies confirm the dual indirect effect of product availability on purchase intentions and its underlying processes. 相似文献