对中国股票市场费雪效应及相关“波动性假说”的检验

本文利用我国1991年1月到2007年12月的月度数据对我国股票市场实际通货膨胀与股票收益的关系进行了实证分析,结果发现:与费雪效应相反,我国通货膨胀率与股票收益呈负相关关系,而且在对解释这种负相关关系的波动性假说(the Variability Hypothesis)的检验中,发现该假说能够解释我国股市股票收益与通货膨胀之间所呈现的这种负相关关系。     

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。     

Country Market Sequential Order-of-Entry: A Learning Effects Approach

ABSTRACT

In this article, we identify and describe the sequential order-of-entry problem. The sequential order-of-entry problem arises when, after having identified a desirable set of country markets to enter, firms are unable (because of budgetary constraints), or unwilling (because of possible learning or strategic issues), to enter all at once. The question then arises whether some sequences to entering the desirable set of country markets are better than others? Answering this question is shown to be nontrivial. The article outlines a number of arguments for the existence of superior sequences to entering a set of desirable country markets, and develops normative and dynamic frameworks to aid in the identification and evaluation of sequences.     

Rationalizability and equilibrium in N-person sequential bargaining

Summary. This paper deals with N-person sequential bargaining games with complete information. For N-person sequential bargaining games, uniqueness of the SPE has been obtained by allowing the players to exit with partial agreements. Adopting a non-equilibrium approach, we show that N-person sequential bargaining games with exit are solvable by a refinement of rationalizability for multi-stage games (trembling-hand rationalizability) whatever the impatience of the players. That is, once we adopt the non-equilibrium approach, the exit opportunity still fulfils its original aim: we achieve a unique solution by introducing the exit opportunity. Moreover, this unique solution is the unique SPE. Received: October 30, 1996; revised version: July 7, 1998     

A field experiment to explore the effects of detection and penalties communications and framing among Washington State retail firms

The Washington Department of Revenue facilitated a field experiment to explore opportunities to increase Use Tax and Business and Occupation (B&O) Tax compliance by retail industry firms. The experiment tested two enforcement strategies (actually put in place by the State of Washington): communication of noncompliance penalties and announcement of an enhanced detection initiative. Of special interest was whether the compliance initiatives would differentially influence firms in divergent financial positions (increasing versus decreasing revenues). Findings were consistent with the gain/loss framing concept of prospect theory: the elevated enforcement initiatives increased both actual reported Washington State Use taxes and B&O Taxes more for firms with declining revenues (loss frame) than for firms with raising revenues (gain frame). Historically the Use Tax has had a low rate of compliance while the B&O Tax has had a high rate of compliance; thus we tested two very different taxes. The results of the experiment suggest that revenue agencies with limited resources may benefit from focusing greater compliance enhancement efforts on firms with declining revenues as more tax dollars will be generated from these taxpayers. For tax researchers, this experiment demonstrates that gain/loss tax framing can occur in nature by means other than withholding.     

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.     

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。     

基于卷积神经网络的列车检测算法研究

列车检测作为列车自动驾驶的核心技术,可以有效地降低列车追尾等事故造成的人身危险和财产损失。为实现精准的列车检测,选用改进的卷积神经网络(PVANET)对输入图像进行特征提取,在此基础上,采用候选区域网络,从生成的特征图里滑动搜索,判断出图像中可能为列车的区域位置,并进一步采用快速区域卷积神经网络对每个候选区域进行分类,计算出其所属类别的置信度,同时精确定位列车。经验证,该方法适应范围广、鲁棒性高,可以有效地检测不同环境光强及不同朝向的列车,保障列车安全,为列车自动驾驶及辅助驾驶提供安全保障。     

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。