ADF单位根检验法的替代方法

研究目标：ADF单位根检验法的替代方法——消除趋势检验法。研究方法：通过蒙特卡罗仿真估算了消除趋势法、ADF法和差分法的检验临界值和检验功效;估算了三种方法检验临界值关于样本容量的响应面函数;估算了消除趋势回归中趋势项和截距项的t统计量的检验临界值及其响应面函数。研究发现：在各种情形下,消除趋势法的检验功效均大于ADF法,而且在误差项相关时更为明显,说明消除趋势法优于ADF法,可以完全替代ADF法;在某些情况下,差分法的检验功效较大。研究创新：对ADF检验模型进行了改进,提出了消除趋势检验法。研究价值：在单位根检验时,可以用消除趋势法代替一直以来被广泛采用的ADF法,提高单位根检验的功效。     

The causal relationship between natural gas consumption and economic growth: evidence from the G7 countries

This article re-examines the nature of the causality between natural gas consumption and economic growth in G7 countries over the period from 1965 to 2011. We employ the Granger causality procedure proposed by Emirmahmutoglu and Kose (2011) which takes into account cross-sectional dependency and heterogeneity across countries. Our overall empirical results support the neutrality hypothesis for the panel while the individual country results confirm the same result with the exception of the case of UK, where the conservation hypothesis is confirmed, showing that GDP causes natural gas consumption in the country. These results make policies that promote the consumption of natural gas risk-free with regard to their effects to the economic growth and development levels.     

Export-led growth: the case of the Slovenian and Estonian economies

The export-led growth hypothesis is investigated in the case of the two small, open and export-oriented Slovenian and Estonian economies. The Johansen cointegration test and Granger causality test were applied to investigate the relationship between the time series variables for export, import and gross domestic product (GDP). The results reveal evidence to support the export-led growth hypothesis in both economies. The Granger causality relationship is found between export growth and economic (GDP) growth for both countries. Slovenia and Estonia can enhance economic growth by providing a better enabling environment for exporters and by market expansion.     

对SHIBOR作为货币市场基准利率在货币政策框架转型下的基准性研究

基于上海银行间同业拆放利率（SHIBOR）报价时间的调整,通过选取银行间回购定盘利率与短期SHIBOR的报价数据,运用格兰杰因果关系检验的方法,对SHIBOR在报价时间调整前后两阶段的基准性进行了对比分析。研究结果表明：SHIBOR报价时间调整以后,在货币市场利率体系中的基准性地位不仅没有得到提升,反而出现了弱化的趋势。     

上海金融发展与经济增长关系的实证研究

本文从实证上研究上海金融发展与经济增长之间的长期和短期关系。协整检验、格兰杰因果关系检验和误差修正模型估计结果表明,上海金融发展与经济增长存在着长期稳定的均衡关系,上海金融发展的规模、结构、效率与经济增长之间存在单向因果关系,即经济增长是金融发展规模的格兰杰原因、金融发展结构是经济增长的格兰杰原因、经济增长是金融发展效率的格兰杰原因,滞后2期的金融发展的效率是经济增长的格兰杰原因。从短期来看,上海金融发展对经济增长的影响也是比较显著的。基于以上研究结论,本文提出完善上海金融结构与提高金融效率的政策建议。     

投资组合构建与调整的合理性及其对基金绩效的影响

从理论推论看,投资组合构建与调整的合理性越高,投资绩效就可能越好。为此,本文构建了衡量组合合理性高低的指标,并采用Kolmogorov-Smirnov检验法、Kruskal-Wallis检验法、基于Wilcoxon秩检验的多重比较法等方法,实证研究我国股票型基金投资组合的合理性对基金绩效的影响。研究结果一方面支持了理论推论的正确性,另一方面也印证了本文所建立的组合合理性指标的可取性。同时论文发现,在牛市熊市的不同情况下,基金组合构建的合理性及其对继续的影响存在差异。论文据此提出了相关的建议和启示。     

商业银行信用风险预警模型的实证研究

选择深沪两市40家上市公司作为样本,对基础财务指标采用相关分析法和逻辑回归法进行筛选,构建信用风险预警模型.实证研究表明:该模型能够有效地为商业银行识别出有问题的企业,从而降低商业银行不良贷款的形成.     

A High‐Frequency Investigation of the Interaction between Volatility and DAX Returns

One of the most noticeable stylised facts in finance is that stock index returns are negatively correlated with changes in volatility. The economic rationale for the effect is still controversial. The competing explanations have different implications for the origin of the relationship: Are volatility changes induced by index movements, or inversely, does volatility drive index returns? To differentiate between the alternative hypotheses, we analyse the lead‐lag relationship of option implied volatility and index return in Germany based on Granger causality tests and impulse‐response functions. Our dataset consists of all transactions in DAX options and futures over the time period from 1995 to 2005. Analyzing returns over 5‐minute intervals, we find that the relationship is return‐driven in the sense that index returns Granger cause volatility changes. This causal relationship is statistically and economically significant and can be clearly separated from the contemporaneous correlation. The largest part of the implied volatility response occurs immediately, but we also observe a smaller retarded reaction for up to one hour. A volatility feedback effect is not discernible. If it exists, the stock market appears to correctly anticipate its importance for index returns.     

农村金融生态环境与金融效率指标体系构建及互动分析

分别建立农村金融生态环境和金融效率评价指标体系,并从理论上分析二者的互动机制。然后运用Granger因果检验法,对1985-2008年农村金融生态环境和金融效率关系进行实证分析,结果显示二者存在Granger因果关系,建议通过优化农村金融生态环境来促进金融效率提高,并带来自身进一步改善。     

储蓄-投资相关性及影响因素的国际研究──基于发展中国家的面板协整分析

储蓄与投资是经济增长的两个基本要素,它们之间的相关关系一直都是现代宏观经济理论研究的核心问题,对此,本文结合最新发展的面板单位根检验及面板协整检验等方法,对中国、巴拉圭等24个发展中国家进行跨国比较,分别从总体样本和单位样本的角度对储蓄-投资的相关关系进行研究,并在此基础上对两者关系形成的各种影响因素进行综合检验。研究结果表明,在本文研究的样本国家及时期内,储蓄与投资在总体上呈现出显著的相关关系,而且与发达国家相比,发展中国家具有相对较小的储蓄-投资相关系数。与此同时,本文研究发现,储蓄-投资相关系数与总抚养比率、经济增长显著相关,而国家规模、贸易开放程度等并非储蓄-投资相关系数大小的决定性因素。