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1.
The Local Whittle Estimator of Long-Memory Stochastic Volatility 总被引:1,自引:0,他引:1
We propose a new semiparametric estimator of the degree of persistencein volatility for long memory stochastic volatility (LMSV) models.The estimator uses the periodogram of the log squared returnsin a local Whittle criterion which explicitly accounts for thenoise term in the LMSV model. Finite-sample and asymptotic standarderrors for the estimator are provided. An extensive simulationstudy reveals that the local Whittle estimator is much lessbiased and that the finite-sample standard errors yield moreaccurate confidence intervals than the widely-used GPH estimator.The estimator is also found to be robust against possible leverageeffects. In an empirical analysis of the daily Deutsche Mark/USDollar exchange rate, the new estimator indicates stronger persistencein volatility than the GPH estimator, provided that a largenumber of frequencies is used. 相似文献
2.
GAO Ge LI Chang 《中国经济评论(英文版)》2008,7(1):6-9
The Bilateral Special Economic Zones is a new idea about economic co-operation ways. It is going to be set by both countries with a common boundary for promoting the economic co-operation between two sides. It can be firstly set along the boundary between China and Vietnam. It will promote the economic co-operation between them, but China and ASEAN. It can be set along the Chinese boundary with the neighboring countries and will promote the economic co-operation between the both sides for setting up a better environment around China. 相似文献
3.
Modelling soccer matches using bivariate discrete distributions with general dependence structure 总被引:1,自引:0,他引:1
In this paper copulas are used to generate bivariate discrete distributions. These distributions are fitted to soccer data from the English Premier League. An interesting aspect of these data is that the primary variable of interest, the discrete pair shots-for and shots-against, exhibits negative dependence; thus, in particular, we apply bivariate Poisson-related distributions that allow such dependence. The paper focuses on Archimedian copulas, for which the dependence structure is fully determined by a one-dimensional projection that is invariant under marginal transformations. Diagnostic plots for copula fit based on this projection are adapted to deal with discrete variables. Covariates relating to within-match contributions such as numbers of passes and tackles are introduced to explain variability in shot outcomes. The results of this analysis would appear to support the notion that playing the 'beautiful game' is an effective strategy—more passes and crosses contribute to more effective play and more shots on the goal. 相似文献
4.
Sunil Poshakwale 《Journal of Business Finance & Accounting》2002,29(9&10):1275-1299
This paper examines the random walk hypothesis in the emerging Indian stock market using daily data on individual stocks. The statistical evidence in this paper rejects the random walk hypothesis. The results suggest that daily returns earned by individual stocks and by an equally weighted portfolio show significant non–linear dependence and persistent volatility effects. The non–linear dependence takes the form of ARCH–type conditional heteroskedasticity and does not appear to be caused by nonstationarity of underlying economic variables. Though conditional volatility is time varying, it does not explain expected returns. 相似文献
5.
何玉龙 《无锡商业职业技术学院学报》2002,2(2):35-36,39
本文着重分析了高校审美教育的必要性以及在培养学生对美的感悟力、审美情趣、完善人格方面的功能性作用,提出了高校实施审美教育的途径。 相似文献
6.
企业信息化项目中的冲突管理研究 总被引:4,自引:0,他引:4
冲突管理作为一种现代管理方法,其应用能够极大地提高企业的管理效率,降低管理成本。本文基于对冲突管理内涵的理解,对企业信息化项目实施过程中的冲突来源进行了深入的剖析与解释,在此基础上,对解决不同冲突的方法进行了探讨。 相似文献
7.
企业生产物流中物料的搬运方式一般由所搬运的物料的功能、性质、搬运量等进行选择,仅局限于定性分析。通过建立数学模型,对企业生产物流搬运方式进行定量优化,并通过实例,说明对生产物流搬运方式进行量化分析是可行的。 相似文献
8.
9.
周萍 《安徽工业大学学报(社会科学版)》2002,19(1):11-12
近年来,在研究生创新能力培养方面,存在学术氛围不浓、创造实践少、指导不力、论文和答辩把关不严等问题.改变这种现状,要增强研究生的创新意识,改善培养环境,重视导师队伍、管理队伍的建设. 相似文献
10.