我国农产品物流网络分析与重构

本文对我国现阶段农产品物流网络结构进行系统分析,从物流场所出发,用系统模型描述了系统的状态,构建了我国现阶段的物流系统有向图,以此为工具,估算了有向图的流量及损失,分析了农产品物流损耗的影响因素。在此基础上,充分考虑农产品物流面对的各种环境,重新构建了包括逆向物流在内的降低农产品物流损耗的物流系统有向图,为提升我国农产品物流系统功能提出建议。     

Up in smoke: demarketing and consumer smoking cessation

The concept of demarketing refers to the use of marketing techniques to reduce or eliminate demand for a product or service. A review of the demarketing literature relating to health and specifically antismoking initiatives indicated that, while research on this topic exists, much of it is not grounded in an acceptable attitudinal or behavioural theory. After determining the importance placed by a sample of 18–24‐year olds on nine demarketing initiatives, two dimensions were identified that best explained this construct. Items within these dimensions were summed and averaged to form single variables, which were then used to form the attitudinal component of the Model of Goal Directed Behaviour. The findings showed that two of these variables – one that captured product packaging aspects and another that consisted of place and price items – significantly influenced the desire to quit and indirectly influenced the intention to quit. Anticipated positive emotions, frequency of quitting attempts and perceived control over quitting also positively influenced the desire and/or intention to quit. The article concludes with a discussion that interprets these findings from a theoretical and practical perspective and suggests directions for future research.     

创意产业经济网络的分析与决策——基于有向节点赋权网络的测度方法

在创意产业等产业经济网络中,其决策分析需要对有向网络主体重要性进行定量测度。综合测度法给出了节点赋权网络中节点重要性的测度方法。但是没有考虑权值交易衰减的变化和路径的有向性,不适用于实际情形常见的有向网络。文章根据节点删除思想提出全面测度法,以易行有效的方法定量测度有向网络中节点的重要性。为创意产业的开发与建设提供决策支持,最后以典型创意产业为例给出其应用。     

Sovereign bond markets and financial stability in an emerging economy: an application of directed acyclic graphs and SVAR models

During the last two decades, domestic government bond markets have developed significantly in emerging economies. Although the financial sector has benefited accordingly, volatility in this market also has posed potential risks in terms of financial stability. This paper uses directed acyclic graphs and structural vector-autoregressive models to evaluate the impact of different shocks on both the public debt market and financial stability. Results suggest that inflation, the policy interest rate and indicators of risk perception are the variables that most affect the slope of the yield curve. In turn, when the slope increases, there is a positive contemporary effect on bank risk indicators.     

E-service innovation: combining directed and practice-based approaches

This paper aims to contribute to the service innovation literature by analyzing the different phases of e-service innovation in relation to the dichotomic model of practice-based versus directed innovation. In detail, using the case study method, the study investigates the innovation process of an e-service initiative developed by one of the largest universities in Italy and a banking group during the idea generation, design and implementation steps. The study advances service theory by detailing the integration of existing perspectives on service innovation and revealing the coexistence of directed innovation and practice-based changes. Finally, based on the results of this exploratory study, the paper concludes with research propositions.     

要素结构与技术进步方向——来自中国城市“撤县设区”的证据

本文基于1997—2010年267个地级及以上城市市辖区面板数据，运用标准化供给面系统方法测算了市级层面的技术进步方向，并借助“撤县设区”这一自然实验，利用工具变量法实证检验了要素结构变动对技术进步方向的影响，研究发现：（1)“撤县设区”使得资本—劳动比上升，进而导致技术进步方向偏向于资本，符合偏向型技术进步的“弱诱导偏向型假说”；（2)“撤县设区”对资本偏向型技术进步的影响是有条件的，主要限于资本—劳动替代弹性大于1即资本—劳动呈替代关系的地区；（3)相比于中西部地区，东部地区资本要素更为丰富，因而“撤县设区”显著提高了东部地区的资本—劳动比，使其技术进步方向偏向资本。     

Knowledge distance and R&D collaboration in Cournot oligopoly

A Cournot collaboration game is complemented with the hypothesis that the cost of R&D collaboration depends on firm’s directed knowledge distance with respect to potential R&D partners. The further hypothesis that directed distance may be non‐uniform and pair‐wise asymmetric reconciles theoretical predictions with qualitative evidence about concentration and multiplicity of components in industrial R&D networks. The welfare properties of sparse stable networks are also affected.     

中国高技能-低技能劳动的技术进步偏向性及其估算

利用世界投入产出数据库(WIOD)中的中国分行业高、低技能劳动数据,推算了1995—2009年中国高、低技能劳动力的劳动投入和劳动报酬,并基于该数据测算了中国省域层面的高技能-低技能劳动技术进步偏向性。结果表明:中国所有省区的技术进步在大多数年份是偏向于高技能劳动的。