基于移动互联网的微信电子商务发展研究

随着计算机技术、网络技术和通信技术的迅猛发展,电子商务已经融入现代生活的各个方面,微信平台的兴起和开发技术的成熟,促使电商业务正由传统电子商务转向移动电子商务。针对基于移动互联网的微信电子商务发展优势进行了总结,分析了当前微信移动电子商务中存在的问题并提出应对策略,展望了微信移动电子商务的发展前景。     

Do ongoing networks block out new friends? Reconciling the embeddedness constraint dilemma on new alliance partner addition

Research Summary: This study addresses a theoretical dilemma regarding how alliance network constraint (reflected by network cohesion) affects a firm’s alliance formation with new partners. Using a network pluralism approach, we separate a firm’s ego alliance network into two activity‐based networks—an exploratory network and an exploitative network—based on the primary value chain activity involved in each alliance. We argue that the cohesion of exploratory or exploitative networks has an inverted U‐shaped effect on the addition of new partners in the same activity‐based network, and a positive effect on the addition of new partners in the other network. Results based on data from the biotechnology industry largely support our predictions with one exception. Our study contributes to both scholarly understanding of network embeddedness and alliance practice. Managerial Summary: The structure of firms’ ongoing alliance networks may have paradoxical implications for their efforts to search for and form alliance with new partners. That is, when a firm’s alliance partners are tightly connected with each other, the cohesive network tends to both encourage and impede the focal firm to add new partners. We resolve this dilemma by showing that when a firm is deeply entrenched in a cohesive alliance network conducting a certain type of activities (e.g., R&D activities), it may not easily add new R&D alliance partners. However, it may still be able to escape from the cohesive R&D alliance network by seeking new partners conducting other activities (e.g., manufacturing activities).     

Why has China’s vertical specialization declined?

Vertical specialization (VS) is quantified by the VS share, which measures the average import content per dollar of exports. A characteristic of China’s export trade is its strong dependence on assembly and processing activities. To take proper account of this, China’s VS shares should explicitly distinguish processing export production from other production. We estimate China’s annual VS shares from 2000 to 2012—the latest year for which a special input–output table is available that makes such an explicit distinction. We find that VS shares increased from 2000 to 2004 and subsequently started to decrease. To explore why it has declined, we introduce a new structural decomposition approach. We find that the decrease of the VS share appears to have been driven mainly by the substitution of imported intermediates by domestic products. This occurred in particular in the production of exports, which implies an upgrading of China’s position in global value chains.     

建立科学的城市可持续发展指标体系

建立一种能综合地、完整地体现城市可持续发展的指标体系,是一项极具挑战意义的工作.本文在对国内外现有的可持续发展指标体系进行梳理的基础上,探讨了构建城市可持续发展指标体系的基本原则,提出了新的城市可持续发展评价指标体系.     

构建与普及理性低碳生活方式——人类文明社会演进的应然逻辑

人类的生活方式是与其社会的文明状态相适应的。原始文明社会中人类的生活方式是“朴素无碳”的,农业文明社会中人类的生活方式是“适应性低碳”的,工业文明社会中人类的生活方式是“发展性高碳”的,而生态文明社会中人类的生活方式应是“理性低碳”的。理性低碳生活方式是人类可持续发展的自我选择,是要在提高生活水平和质量的进程中实现低碳化,是生活方式的革命性发展。构建和普及理性低碳生活方式,需要树立和强化低碳生活理念,实现衣食住行等多方面的低碳化改造;需要全人类的共同努力,各个国家和地区应根据实际情况选择和普及各具特色的理性低碳生活方式;需要各生活主体的协同配合,政府、企业与居民等要全方位地、积极地、广泛地践行理性低碳生活方式。     

气候变化与旅游研究综述

全球气候变化是当今自然地理学研究的重要课题之一,同时因直接或间接地对旅游业发展产生影响而受到广泛关注。通过对全球气候变化与旅游相关的现有研究梳理发现:相关研究成果丰富,理论框架基本成熟,研究时空尺度广泛,定性与定量方法兼顾,重视以低碳旅游为热点的策略研究。在后续研究中需要进一步考虑旅游市场需求影响;在气候变化视角上重视积极影响研究;气候指数和模型的适用性和客观性仍有待深入讨论;小气候与环境的微观变化对景区或某些景观的影响讨论不足;需要重视综合指标和多维体系的构建。     

Choose to Fight or Choose to Flee? A Network Embeddedness Perspective of Executive Ship Jumping in Declining Firms

Research summary: Executives in declining firms may engage in ship‐jumping behavior (i.e., voluntarily move to new employers before the failure occurs) to avoid the stigma of failure. However, it is unclear how executives decide whether or not to jump ship. Building on a network embeddedness perspective, we highlight how three network‐based indicators (i.e., executive social capital, the social capital of other peers in the declining firm, and the declining firm's alliance network) influence the executive‐level ship‐jumping decision by shaping its benefits and opportunity costs. Using data from executives at failing firms in China, we find support for our hypothesized relationships. Our research provides important insight into the network mechanisms driving the ship‐jumping decision. Managerial summary: Executives at failing firms have a choice: stay and attempt to rescue the firm from failure or exit and avoid the stigma of the failure (i.e., jump ship). Yet, little is known about what factors affect this choice. We propose that social capital plays an important role in the decision. Our evidence from specially treated (*ST) public firms in China finds that ship jumping is lowest at low and high values of social capital, and highest at moderate levels of social capital (an inverted U‐shaped relationship). In addition, higher levels of peer social capital (in the declining firm) as well as a well‐established firm‐level alliance network discourage the ship‐jumping choice. Copyright © 2017 John Wiley & Sons, Ltd.     

对中国原油期货市场的几个认识误区——基于国际原油期货市场的发展

在对世界和亚洲石油期货发展情况和特点进行总结分析的基础上,结合中国石油期货市场发展的历史沿革,针对拟推出的上海原油期货的框架计划,对目前市场上存在的几个认识上的误区作了批判性思考和分析,包括:中国作为原油生产、消费和进口贸易大国,原油期货市场一经推出就必然会取得成功;原油期货市场应该将主要国产原油作为合约标的油种;期货合约标的油种上市交易,其价值一定会回归上涨,只要其价值回归、价格上涨,就一定有利于石油企业的发展和国家利益;推出原油期货市场,就意味着取得了原油定价权等.     

欧盟天然气供应安全法规建设及其对中国的启示

从探讨天然气供应安全的含义出发,详细分析欧盟国家天然气供应安全的法规建设.结合欧盟典型国家的实践,提出应结合中国实际,形成具有中国特色的天然气供应安全体系.中国天然气供应安全建设要在立法的前提下,建立天然气供应标准、基础设施标准,严格界定“受保护用户”的范围,不能简单将供应安全的责任推给市场主体的任何一方,要通过市场机制有效保障天然气的供应安全.     

中国经济金融化与城镇化的空间计量分析——基于直接效应与间接效应分解

在理论分析经济金融化影响城镇化机制的基础上,运用我国省际面板数据建立空间计量模型,并采用直接效应和间接效应分解的方法来探寻经济金融化对本区域和邻近区域城镇化发展的影响效应及特征。研究发现,经济金融化对本区域城镇化的影响存在着倒"U"型的非线性转换特征。当经济金融化水平未达到倒"U"型曲线的顶点以前,对该区域城镇化的影响效应显著为正;而其跨越"U"型曲线的顶点后,对该区域城镇化发展的负面效应便开始显现。但值得注意的是,其对邻近区域城镇化影响的非线性特征并不显著,而是存在显著的、线性的负向关系,会制约邻近区域城镇化的发展。此外,工业化和农业人力资本两个控制变量对本区域和邻近区域的城镇化影响效应均显著为正。