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51.
52.
This paper introduces a new nonparametric test to identify jump arrival times in high frequency financial time series data. The asymptotic distribution of the test is derived. We demonstrate that the test is robust for different specifications of price processes and the presence of the microstructure noise. A Monte Carlo simulation is conducted which shows that the test has good size and power. Further, we examine the multi-scale jump dynamics in US equity markets. The main findings are as follows. First, the jump dynamics of equities are sensitive to data sampling frequency with significant underestimation of jump intensities at lower frequencies. Second, although arrival densities of positive jumps and negative jumps are symmetric across different time scales, the magnitude of jumps is distributed asymmetrically at high frequencies. Third, only 20% of jumps occur in the trading session from 9:30 AM to 4:00 PM, suggesting that illiquidity during after-hours trading is a strong determinant of jumps. 相似文献
53.
We propose a new family of copulas generalizing the Farlie–Gumbel–Morgenstern family and generated by two univariate functions.
The main feature of this family is to permit the modeling of high positive dependence. In particular, it is established that
the range of the Spearman’s Rho is [ − 3/4,1] and that the upper tail dependence coefficient can reach any value in [0,1].
Necessary and sufficient conditions are given on the generating functions in order to obtain various dependence properties.
Some examples of parametric subfamilies are provided. 相似文献
54.
When analysing the behavior of investors, the emphasis is usually on positive feedback and herding behavior, and the existing literature abounds with studies on the domestic strategy of mutual funds or on their impact. Due to the advantages in terms of the data, many studies investigate US data. However, with the increased flows of capital into emerging markets, studying the behavior of international mutual funds in emerging markets has become more and more important. Nevertheless, studies involving emerging markets are relatively rare. This study examines whether the positive feedback effect and herding behavior exist in Asian markets based on mutual fund data covering the period from 1996 to 2004. The long period enables us to test the sensitivities under the following four conditions, namely the capital volatility (volatile vs. stable), the degree of suffering during the Asian crisis (more suffering vs. less suffering), and the timing of the Asian crisis (pre-, during, and post-crisis), using the exchange rate regime. It was found in this study that mutual fund inflows into the Asian market were attracted by positive stock returns and currency appreciation. Furthermore, it was found that the positive feedback effect and herding behavior did exist in the Asian markets. However, the extent of the above behavior is not the same under different conditions. 相似文献
55.
56.
根据信息经济学的不对称理论和博弈论,公共决策实质上就是非同质性决策参与者的多重利益博弈过程。公共决策模式包括精英决断型、冲突斡旋型、专家建议型、代表协商型和全民公决型五种类型。公共决策产出实质上就是通过这五种模式做出的关系调整与利益平衡。 相似文献
57.
公众演讲具有一定的时代性、社会性和鼓动性。本文旨在以评价理论为框架,从积极话语分析角度出发,分析“级差”在《潘基文·南京大学演讲》语篇分析中所起的作用,具体探究发言者在演讲中是如何使用评价资源来表明自己的立场、观点和态度的,从而阐释积极话语分析的社会意义。 相似文献
58.
LI Dong-sheng 《国际商务-(对外经济贸易大学学报)》2007,(5)
山东省蔬菜具有成本和数量的优势,但存在单位价格低、出口市场过度集中和效益差的问题。在分析山东省近10年蔬菜出口变动状况的基础上,探究日本出台"肯定列表制度"的背景及其对我国山东省蔬菜出口企业产生的影响,并从地方政府、行业协会与出口企业的角度提出相应的对策与建议。 相似文献
59.
入世前后我国棉花国际贸易影响因素的比较分析 总被引:2,自引:0,他引:2
本文运用格兰杰因果关系检验法对入世前后影响我国棉花国际贸易行为的诸因素进行了甄别和计量分析,研究表明在入世前我国棉花垄断经营时期,棉花的进出口只关注供给层面而忽视需求层面,并随着生产量和库存量的变化而波动,而入世以后我国棉花国际贸易波动则主要是受市场价格及需求因素的影响。 相似文献
60.
我国外国直接投资技术溢出效应影响因素的实证研究 总被引:1,自引:0,他引:1
本文旨在探索外国直接投资技术溢出效应影响因素的实证研究方法。首先对外国直接投资技术溢出效应影响因素的实证研究现状进行综述。然后,采用回归分析方法与通径分析方法对外国直接投资技术溢出效应的影响因素进行实证分析,经过比较发现,这两种方法的结论基本一致,但通径分析方法优于回归分析方法,并提出了产生技术溢出效应的门槛应该是东道国影响外国直接投资各因素一系列指标的集合这一观点。 相似文献