玉米期货价格收益率和波动性的实证研究——以中国大连与美国CBOT市场为例

采用协整模型、Granger因果关系检验、误差修正（EC）模型及几种GARCH模型对中国大连与美国CBOT的玉米期货价格及收益率和波动性进行了实证研究。分析发现：两市期货价格之间存在双向的Granger因果关系和显著的协整关系;两个市场之间存在显著的同向变动关系,存在长期的共同趋势;EC模型反映出两市的长期期货价格收益率没有显著差异,两市均受到对方市场期货价格收益率的影响,但短期波动过程则存在一定的差异。此外,通过建立GARCH类模型发现：两市在波动性的传导和影响上存在一定程度的非对称性;两市均存在溢出效应与一定的杠杆效应,大连玉米期货市场对CBOT玉米期货市场的溢出效应显著存在,而CBOT玉米期货市场对大连玉米期货市场的溢出效应不显著存在,市场的波动性对消息影响呈现一定程度的非对称性。由此可见,大连玉米期货价格已经具备了较强的国际定价功能。     

中国东部三大都市圈经济发展对比研究

改革开放30年来,东部地区的长三角、珠三角和京津冀三大都市圈在中国经济发展中具有举足轻重的地位,已成为中国经济发展的典型区域。本文分析了中国东部三大都市圈经济发展的共同力量,即沿海的地理优势和中国经济改革的优惠政策。进而运用数据对比,挖掘东部三大都市圈经济发展中差异化的主导力量,京津冀都市圈是政府干预主导下的经济发展;长三角都市圈是市场力量主导下的经济发展;珠三角都市圈是由政策引导和外向型经济等外在力量作用下政府干预和市场力量共同作用的经济发展。     

Dynamic causality between the U.S. stock market,the Chinese stock market and the global gold market: implications for individual investors’ diversification strategies

This paper proposes a generalization of the prior VAR and EGARCH model to explore the linkage between returns and volatility transmissions in the U.S. stock market, the Chinese stock market, and the global gold market from 10 July 1996 to 20 July 2018. We found that past returns of the U.S. stock market can predict the current returns of the other two markets, and that significant reciprocal volatility transmission existed within and across all three markets. We further implemented average out-of-sample (OOS) forecasting to show that a risk-adjusted portfolio, such as mean-variance with sample estimator, does not outperform an equal-weighted portfolio. This provides insights for individual investors and helps to explain the ongoing disagreement in the portfolio literature concerning the effectiveness of risk-adjusted portfolios and equal-weighted portfolios when the number of assets is small.     

Mitigating information asymmetry through sustainability assurance: The role of accountants and levels of assurance

This paper aims to examine the usefulness of sustainability reporting in reducing information asymmetry as result of lower dispersion and higher accuracy in financial analysts’ earnings forecasts. The empirical results from an international sample of listed companies indicate that the disclosure of sustainability information alone is not sufficient in this regard as our findings indicate that information asymmetry is reduced to a greater when such information is assured, supporting the value relevance role of sustainability reporting and assurance. In addition, the empirical findings suggest differences in terms of assurance attributes (provider and level of engagement) and such differences are even more relevant when controlling the institutional context. Assurance is highly appreciated by investors in more stakeholder-oriented countries; however, in more shareholder-oriented environments, assurance affects information asymmetries only when it is provided by accounting professionals who also report a “reasonable” opinion.     

Global supply network embeddedness and power: An analysis of international joint venture formations

As a subset of the international business literature, cross-border equity based partnerships have drawn significant academic attention. In the context of inter-firm partnerships, the power dynamics between parties and the implications that power has on the relational dynamics between firms is an important consideration. Research that connects power with network theory has recently emerged, suggesting that the network, as a source of power, plays a significant role in inter-firm dynamics. Yet, while there has been a substantial body of work either articulating the antecedents and consequences of power, little research has paid attention to the role that power plays in international JV formations; this presents a significant gap in the international business literature. Consequently, this study investigates the role that global network structure plays in the formation of new equity based international partnerships. Secondly, it contributes to the international JV literature by developing and testing a theoretical framework that examines inter-firm power dynamics as derived from the network position of each firm in the global network. Global network prominence, brokerage and weakness are key factors utilized in the analysis. The hypotheses are tested using a global manufacturing joint venture longitudinal dataset that contains 985,689 observations from 1985 to 2003. The results of the event history analysis indicate that for the manufacturer global network prominence, brokerage and weakness play an important role in new joint venture formations. On the other hand, only global network prominence is a significant factor for the potential partner.     

跨境电商对华商网络贸易的效应分析

在就跨境电商对华商网络贸易所具有的替代效应与互补效应进行理论分析的基础上,利用古诺模型分析市场均衡的结果及贸易效应,采用面板数据实证检验跨境电商对华商网络贸易的影响,结果表明跨境电商对华商网络贸易的互补效应大于替代效应：一方面,由于华商网络对出口贸易的影响尤为显著,而跨境电商平台又以出口贸易为主,从而跨境电商对华商网络出口贸易的影响较大;另一方面,跨境电商平台偏向于差异化产品贸易,因而跨境电商对差异化产品的华商网络贸易有着较大影响。也就是说,跨境电商对华商网络贸易的互补效应在出口贸易与差异化产品贸易上表现得尤为显著。     

Tourism trails as tools for cross-border integration: A best practice case study of the Vennbahn cycling route

This paper evaluates which processes determine the leverage of cycling tourism trails for mainstreaming cross-border contact and ‘soft’ region-building. Reflecting on the Vennbahn between Germany, Belgium and Luxemburg, the paper shows that the influence of routes on cross-border integration depends on the trail’s strength as a tourism product, its cross-border institutionalization, and the geography and scale of the trail and the involved destinations. Tourism trails could contribute to cross-border integration, vindicating the substantial money spent on such projects in INTERREG programmes. However, border-related barriers remain robust even for tourism projects that are best practices of cross-border cooperation. As such, there is an unfulfilled potential of tourism trails in their contribution to cross-border communication and social cohesion in many European borderlands.     

纳税信用管理与财政补贴效率

基于新纳税信用管理的实施,采用双重差分法实证研究我国纳税信用管理对财政补贴效率的影响。结果发现：纳税信用管理能促进信用良好的企业获得财政补贴,并改善企业运用财政补贴的效果,有助于提高财政补贴的效率。机制分析显示,纳税信用管理通过信号传递机制和奖惩机制减少信息不对称,从而提高财政补贴的效率。此外,纳税信用管理对信用良好的中小企业、非国有企业获取财政补贴、运用财政补贴的效率有更大的积极作用,反映纳税信用管理通过改善财政补贴的效率也有助于提高财政补贴的公平性。     

建国以来中国国家形象建设的历史演变及启示

随着全球化进程加速演变和中国改革开放事业不断推进,中国的国家形象建设问题日益引起关注。梳理和总结建国60年来中国国家形象建设历程和经验,加深对国家形象建设规律的认识和把握,对于在新的历史起点上推进国家形象的建设具有十分重要的作用。新时期中国国家形象建设应具有新的思路,需要转变观念,调整战略,要讲究传播策略,提升塑造效果。     

Power,policy networks and planning: the involvement of major grocery retailers in the formulation of Planning Policy Guidance Note 6 since 1988

This paper explores a neglected issue in the study of retail strategy and store location by considering the nature of policy networks operating at the interface between retailers and central government. It argues that informal networks, coupled with the economic power of retailers and the legitimization of their activities with reference to the 'consumer interest', have served to provide retailers with an influential avenue through which they can exert power over the nature of the regulatory environment within which they operate. The paper considers the limited extant 'evidence' of the operation of such networks before moving on to outline the results of a case study. The case study reflects on new store development in the UK grocery sector since 1988 as a backdrop to an analysis of the form of policy networks operating at the interface between government departments and retail organizations. It also explores the role of other stakeholders in this process. The existence of a number of such networks is described and their role explored with reference to the involvement of retailers in the formulation and evolution of Planning Policy Guidance Note 6 on retail development.