基于航空运输的应急物资配送网络优化研究

近年来突发事件的频发给我国带来了重大的生命财产损失,应急物资配送网络的合理构建是提高我国突发事件应急处置能力的重要途径之一.提出一个抗风险能力强、反应速度快、成本节约的基于航空系统的应急物资配送网络目标规划模型,优化应急物资配送中心布局以及应急配送网络的组织形式,并选取全国100个通用机场为例进行实证分析.研究结果表明,最佳的应急物资航空配送网络是以长春、乌鲁木齐、济南、成都、南昌为配送点的中心辐射式网络,且该网络布局形式的投入成本随应急反应时间的缩小而大幅上升.     

Factors influencing partner selection in strategic alliances: the moderating role of alliance context

The growth of alliances has generated considerable interest in this topic among both academics and practitioners. While multiple factors may affect alliance success, partner selection emerges as one of the most influential. Previous studies on alliances present general models that assume the factors (e.g., trust, commitment, complementarity, financial payoff) that drive partner attractiveness and, in turn, the likelihood of selection, are consistent across varying alliance projects and situations. In contrast, the present study proposes a contingency approach grounded in management control theory that suggests the criteria managers use in choosing alliance partners will vary by alliance project type. Specifically, it introduces a framework that addresses when and why managers select partners with certain, specific characteristics. The results of the present study strongly support hypotheses that the critical criteria for assessing alliance partner attractiveness and selection vary depending on the differential levels of process manageability and outcome interpretability inherent in a strategic alliance. Implications for theory and practice are discussed. Copyright © 2008 John Wiley & Sons, Ltd.     

The appropriateness of default investment options in defined contribution plans: Australian evidence

For participants in defined contribution (DC) plans who refrain from exercising investment choice, plan contributions are invested following the default investment option of their respective plans. Since default investment options of different plans vary widely in terms of their benchmark asset allocation, the most important determinant of investment performance, participants enrolled in these options face significantly different wealth outcomes at retirement. This paper simulates the terminal wealth outcomes under different static asset allocation strategies to evaluate their relative appeal as default investment choice in DC plans. We find that strategies with low or moderate allocation to stocks are consistently outperformed in terms of upside potential of exceeding the participant's wealth accumulation target at retirement as well as downside risk of falling below that target outcome by aggressive strategies whose allocation to stocks approach 100%. The risk of extremely adverse wealth outcomes for plan participants also does not appear to be very sensitive to asset allocation. Our evidence suggests the appropriateness of strategies heavily tilted towards stocks to be nominated as default investment options in DC plans unless plan providers emphasize predictability of wealth outcomes over adequacy of retirement wealth.     

An Investigation of Market Orientation (MO) and Tourism Small and Medium-Sized Enterprises’ (SMEs) Performance in Developing Countries: A Review of the Literature

This paper aims to build a structured literature review of the field of market orientation and its impact on tourism small and medium-sized enterprises (SMEs) performance in developing countries. This literature review will present a comprehensive survey of market orientation (MO) published articles to facilitate good understanding of MO. It serves as an archive and aims to help the scholars and practitioners to explore, analyse, and develop a clear understanding about the different research points and methodologies implemented in previous studies related to MO and its impact on tourism SMEs’ performance. The paper systematically reviews and categorizes the published literature implementing a three-stage methodology, and thereafter analyzes and reviews this literature methodologically. The review covered many areas and identified some factors that drive/hinder market-oriented activities within tourism SMEs. Furthermore, suggestions have been made to understand more thoroughly how market orientation influences tourism SMEs performance in developing economies. A research gap in the area of market orientation and tourism SMEs performance in developing countries was identified. The study provides great benefits for owner-managers, government policy makers, scholars, and educators by clarifying the concept of market orientation and its relationship with performance in the context of tourism SMEs.     

Accident risk analysis based on motorway exposure: an application of benchmarking technique for human safety

Abstract

Accident risk analysis for human safety and infrastructural improvement are key requirements of the engineering sector. The purpose of this paper is to identify and prioritize problematic segments of roads based upon the risk evaluation concept and to focus on the severity of accidents regarding human life loss and easy manoeuvring. This study includes the concept of considering road segments as decision-making units for application of data envelopment analysis (DEA) technique which has no compulsion of the distribution function and critical assumptions, unlike the multiple regression models. According to the proposed methodology, a section of Motorway (M-2) Lahore-Islamabad has been analyzed. Out of 200 segments under consideration, 99 segments were selected with at least one accident and one injury or fatality. Furthermore, for risk calculation and ranking of road segments, the DEA technique along with the cross-risk matrix method was applied. This optimization technique could not only be helpful in ranking but also technical decision-making and prioritizations for safety improvement, policymaking and budget allocation.