二氧化碳排放强度下降目标的动态分解研究——基于“十二五”规划目标的分析

针对十二五规划中二氧化碳排放强度下降17%的目标,设定两种分解路径——等比路径和等差路径,采用数理经济学理论,将之分别对应到二氧化碳排放强度和人均国内生产总值两项指标的幂函数路径和对数函数路径。根据1990~2007年全球主要地区和中国的历史经验数据,对上述两个函数的参数进行模拟,并对二氧化碳排放量路径进行预测。研究发现,幂函数最优路径比国际经验对应的最优路径更为激进;幂函数最优路径比对数函数最优路径更为灵活,但后者减排潜力更大。若走对数函数路径,在远期保持国内生产总值年均7%增长速度的前提下,到2038年我国将达到二氧化碳排放量的峰值,之后便逐步下降。     

Technology competencies in competitive environment

Although prior studies suggest that technology competencies play a significant role in firm innovation and competitiveness, what and how technology competencies interacted with competitive environment affect firm innovation has not been fully understood. This paper fills this research gap through a questionnaire survey of 165 firms together with a number of interviews drawn from the Taiwan's information and communication technology (ICT) industry. The results suggest that capabilities of exploring or exploiting technological opportunities, core technology capability, and autonomy of R&D decisions are particularly important to firm innovation in a highly competitive environment, whereas over commitments to existing technologies may constrain a firm's innovation especially in such environment. Moreover, different types of competitive environment require different types of technological competencies to enhance firm innovativeness. This paper contributes to the existing theory by examining the joint effect of technology competency and competitive environment on a firm's innovation.     

I Have Paid Less Than You! The Emotional and Behavioral Consequences of Advantaged Price Inequality

This study examines the emotion blends and the subsequent customer reactions that occur in advantaged price inequality situations, that is, when consumers learn that retailers charged them a lower price than what the same retailers charged another customer. Drawing on the appraisal theories of emotion and on social comparison theory, an experiment (n = 272) and a field study (n = 261) are conducted. The results reveal that in advantaged price inequality situations, customers experience a host of positive and negative emotions depending on two factors: the quality of relationship that the customer has with a disadvantaged other customer (neutral, positive, or negative) and the attribution of agency for the price advantage (situational attribution to competition, external attribution to store policies, or internal attribution to customer abilities). Positive emotions include happiness, gratitude, pride, and malicious joy; while negative emotions include pity, outrage, and guilt. These emotions are shown to mediate the occurrence of customer reactions (i.e., customer satisfaction, loyalty, WOM referral, and WOM activity). The article concludes with theoretical implications and recommendations for retail practitioners on how to use dynamic pricing.     

基于动态AHP的企业信息化水平评价——江苏沙钢集团信息化水平案例研究

文章运用动态AHP方法研究企业信息化的发展过程,并结合江苏省沙钢集团企业信息化发展的案例,根据信息化五阶段模型,判断该企业信息化所处的发展阶段,继而对沙钢集团信息化发展提出战略性建议。希望不仅对沙钢集团有指导和推动作用,对其他企业的信息化发展也有启示和帮助。     

Dynamic routing of time-sensitive air cargo using real-time information

The route planning of time-sensitive air-cargo is becoming more important with the growing air-network congestion and delays. We consider a freight forwarder’s routing of a time-sensitive air-cargo in the presence of real-time and historical information regarding flight availability, departure delays and travel times. A departure delay estimation model is developed to account for real-time information inaccuracy. A novel Markov decision model is formulated and solved with online backward induction. Through synthetic experiments and case studies, we demonstrate that dynamic routing with real-time information can improve delivery reliability and reduce expected cost.     

Immigration and international inbound tourism: Empirical evidence from Australia

Immigration can potentially influence tourism flows. However, in spite of the vast number of studies on tourism demand modelling, the immigration-tourism linkage has not received much attention in the empirical literature. This paper seeks to address this gap. A dynamic demand model is developed and estimated using data from 1980 to 2008 for the 15 main markets of Australia. The explanatory variables included are income, own price, price of a substitute destination, airfare and immigration. The estimation results empirically establish the connection between immigration and inbound tourism. The short run and long-run immigration elasticities generated are 0.028 and 0.09 respectively. Additionally this paper demonstrates that omission of prices of substitutes affects the value of the own price elasticity of demand. The results have implications for future research and for stakeholders who can improve the efficiency of their planning exercises by taking into account additional information on immigration trends.     

Self-reinforcing effects between housing prices and credit

The financial crisis has brought the interaction between housing prices and household borrowing into the limelight of the economic policy debate. This paper examines the nexus of housing prices and credit in Norway within a structural vector equilibrium correction model (SVECM) over the period 1986q2–2008q4. The results establish a two way interaction in the long-run, so that higher housing prices lead to a credit expansion, which in turn puts an upward pressure on prices. Interest rates influence housing prices indirectly through the credit channel. Furthermore, households’ expectations about the future development of their own income as well as in the Norwegian economy have a significant impact on housing price growth. Dynamic simulations show how shocks are propagated and amplified. When we augment the model to include the supply side of the housing market, these effects are dampened.     

Expropriation risk and technology

This paper develops a unified framework to analyze the dynamics of firm investment in countries with poor legal enforcement. The firm's technology edge over the government generates endogenous property rights. Industry variation in the technology gap predicts a sectoral pecking-order of expropriations. Long-run investment distortions may be Pareto superior relative to persistent investment at the static optimum. The dynamics of investment and transfers depend on whether incentives (backloading) or efficiency (frontloading) concerns dominate at the initial division of surplus. An increase in government efficiency may reduce its welfare. The model provides a technology-driven rationale for the widespread use of conglomerate structures in emerging market countries.     

Dynamic advertising and pricing with constant demand elasticities

In this paper we analyze a stochastic dynamic advertising and pricing model with isoelastic demand. The state space is discrete, time is continuous and the planing horizon is allowed to be finite or infinite. A dynamic version of the Dorfman–Steiner identity will be derived. Explicit expressions of the optimal advertising and pricing policies, of the value function and of the optimal advertising expenditures will be given. The general results will be used to analyze the case of impatient customers. Furthermore, particular time inhomogeneous models and homogeneous ones with and without discounting will be examined. We will study the social efficiency of a monopolist's optimal policies and the consequences of specific subsidies. From a buyer's perspective, our analysis reveals that waiting – when looking at (immediate) expected prices – is never profitable should two or more units be available. But we will also prove that the sequence of average sales prices is monotone decreasing. Moreover, the techniques applied to solve the discrete stochastic advertising and pricing problem will be used to solve a related deterministic control problem with continuous state space.     

海外油气投资目标筛选决策支持系统研究

受全球一体化趋势的影响，油气资源与世界经济、政治、外交和军事的关系更加密切，围绕油气资源展开的国际竞争变得异常激烈。随着不确定外部环境的无序演化，油气安全的影响因素日益复杂。海外油气资源的争夺和中国海外油气资源供给渠道的稳定，需要科学的投资目标筛选决策。基于海外油气投资环境的动态演化和石油公司跨国经营非合作博弈特点，全方位构建了包含动态指标的海外油气目标国家投资环境评价指标体系，运用多层次灰色模型建立了海外油气投资目标筛选模型，通过编程建立和实现其决策支持功能。为系统评估海外油气资源争夺的战略机遇提供了方法借鉴。