"双碳"目标下电动公交充电站优化布局研究

为实现"碳达峰"、"碳中和"的目标,大力发展电动公交车,并建设配套的充电站,已成为我国政府接下来的工作重点.目前对电动公交充电站优化布局的研究,缺乏对定量和定性因素的综合考量.文章将定量的构建数学模型的方法与定性的综合评价的方法相结合,提出了一个新的电动公交充电站优化布局框架体系.首先建立0-1整数规划模型,同时对充电站的选址和服务范围进行决策.接着设计电动公交充电站布局的评价指标体系,使用层次分析法-模糊综合评判法对充电站布局方案进行综合评估.以江阴市公交网络数据进行实证分析,验证了文章提出的方法可以为电动公交充电站布局提供科学、合理的决策支持.     

Debt maturity and firm productivity—The role of intangibles

Does the maturity of debt matter for productivity? Using data on Italian firms from 1997 to 2015, we study the relationship among debt maturity, productivity, and firm characteristics. We find that productivity is positively associated with short-term debt and negatively associated with long-term debt. This result supports the hypothesis that the less intense monitoring of firm performance and fewer liquidation fears stemming from the long maturity of debt causes a moral hazard, while short-term debt serves as a disciplinary device to improve firm performance in the short run. This effect is evident in small- and medium-sized enterprises and old firms. In contrast, large firms can utilize long-term financing to improve productivity through long-term investments. Firms improve productivity by purchasing intangible assets financed by short-term debt.     

Untangling the paradox of Licensed Shared Access: Need for regulatory refocus

This paper looks at the evolution of the Licensed Shared Access (LSA) – a pioneering European scheme for tapping into radio spectrum that remains assigned to incumbent users. Using the theoretical framework of Co-evolutionary Development, we build analytical case study to understand why this crucial innovation did not take hold in the European wireless market, despite a decade of regulatory and standardisation efforts. Drawing on literature analysis and expert knowledge, we identify barriers that contributed to the stalling of LSA deployment and co-evolutionary forces that could help alleviating them. We expose the need for more proactive engagement of European regional policymakers and suggest directions for refocusing future LSA regulatory activities to target an expanded set of frequency bands, as well as broadening their scope to include local non-public networks and industry verticals.     

大跨度高墩连续梁0号现浇支撑系统研究

进行西河大桥大跨度连续梁的高墩0号段现浇施工时,经科学比选及评估,模板支撑体系采用了墩顶锚固三角架法。并对传统的锚固三角架法的支撑构造进行了优化和创新,克服了该类型支架存在高空作业和高空焊接多,构件焊接质量难以控制而存在较大安全隐患等问题。使得本项目0号块现浇支撑体系在安全、经济、进度及造价方面均取得了良好的效果。     

Managing socio-political risk at the subnational level: Lessons from MNE subsidiaries in Indonesia

Within emerging markets, institutional conditions vary significantly at both the country and subnational levels. Although the extant literature recognises the types of risk faced by multinational enterprises (MNEs) in emerging markets, it has hitherto paid scarce attention to explaining how MNEs manage such risk at the subnational level. Reporting on four case studies from Indonesia, we outline how MNEs ensure their success by maintaining active relationships with a variety of non-market actors—including opinion leaders, government officials, and communities at the subnational level. In our study, we developed a conceptual framework, showcasing how MNEs can manage socio-political risk within heterogeneous institutional settings.     

The impact of customer-generated evaluation information on sales in online platform-based markets

As the online platform-based market expands, research into the impact of consumer-accessible information in this market on performance has received significant attention in recent years. In this study, we focus on customer-generated evaluation information (CGEI). The purpose of this study is to demonstrate the effect of CGEI—both quantitative (i.e., star rating, star rating volume) and qualitative (i.e., customer review content) aspects—on actual sales in an online platform-based market. We analyze the regression of quantitative GCEI on sales and for qualitative GCEI we apply the Latent Dirichlet Allocation (LDA) topic modeling. We discover that star ratings do not always lead to increased sales, implying that star ratings and sales have an inverted U-shaped relationship. Furthermore, the results demonstrate that star rating volume has a positive effect on sales. We reveal that the review contents of product quality and added value have a positive effect on sales, whereas those of seller service have no effect on sales. This study provides some insight into how customer-generated information can increase actual sales in online platform-based markets.     

Rethinking value co-creation and loyalty in virtual travel communities: How and when they develop

For marketers of virtual travel communities (VTCs), a vital issue is to understand how to maintain consumer stickiness and loyalty. Although existing studies have tried to explore this issue, researchers have not given detailed and specific answers from the value co-creation theoretic lens. Therefore, the present paper aims to bridge this research gap by investigating the relationship among consumer trust in VTCs, consumer co-creation behaviors and their loyalty. The moderating impact of community service quality (CSQ) on loyalty is also explored. Data from a two-wave survey were collected from 214 active users in a Chinese VTC (Mafengwo) and then analyzed using the ordinary least squares (OLS) technique with STATA 13. Results indicated that (1) consumer trust positively impacts on two dimensions of value co-creation behavior, namely, breadth participation and depth participation. (2) Depth participation is more conducive to cultivating both attitudinal and behavioral loyalty, while breadth participation has an inverted U-shaped influence on behavioral loyalty. (3) CSQ positively moderates the relationship between depth participation and attitudinal loyalty. But after controlling for the effect of attitudinal loyalty on behavioral loyalty, this study found that CSQ negatively moderates the relationship between depth participation and behavioral loyalty. This paper developed a comprehensive framework involving antecedent and consequence of consumer co-creation behavior and showed the importance of CSQ as a key boundary condition, enriching the existing VTC and consumer loyalty research from the perspective of value co-creation and trust theory. Corresponding practical implications and limitations are also discussed.