试述我国股市有效性的研究方法及检验

本文围绕我国股市的效率展开,意欲对其是否有效进行检验。指出市场 效率不是一个简单的问题,以主观选择的有限的数据得出的结论,往往因人而异,但总可以以主流的状况表示市场的状况。结论是：我国股市尚未达到弱型效率。     

中国股票市场有效性特征的实证分析

有效市场假说是金融市场的一个理想化境界,却得到大量的实证支持。从中国的现实情况来看,股市有效性的检验主要集中在是否具有弱式有效,国内已有不少学者做了实证研究,由1993年以前的研究数据得出的结论是非有效市场,此后的研究大多支持弱式有效,这反映中国股市存在明显的阶段性变化。此外,一些学者对若干个区间子样本的实证结果也说明市场效率随发展阶段而不断提高。     

中国股票市场有效性研究综述

股票市场的有效性是衡量股市公开、公平和股市资金分配效率的重要标志。1965年法玛(E.Fame)发表题为“股票市场价格的行为”一文,定义了三种不同程度的市场效率:弱式效率、半强式效率和强式效率。此后,威斯特、惕尼克(West＆Tinic,1976)和简森(Jensen,1978)分别对股票市场效率进行了论述。中国开展股票市场效率研究主要是从1994年开始的,并借鉴了国外的理论和研究方法。     

上海股票市场半强式有效性实证分析

股票市场有效性是指股票价格对市场信息反映的有效化程度,如果所有股票价格都充分反映了所有相关信息,股市即达到了有效状态.股票市场的有效性是股市成熟程度的表现,根据有效性程度,其可分为弱式有效市场、半强式有效市场和强式有效市场.基于此,本文通过抽取上海股市中的30家上市公司进行实证研究进而判别上海股市是否已达到半强式有效市场.     

上海股市有效性与可预测性并存的实证研究

选取上证日收盘价综合指数（1997／01／02－2001／05／30）作为样本,对上海股市的有效性与可预测性分别建立模型进行验证和分析：利用时间序列相关性分析和随机游程模型对上海股市的弱有效性进行检验;建立AR模型验证上海股市的可预测性。通过检验发现,上海股市既通过了弱有效性的检验,又通过了AR模型的验证,即是一个可预测的弱式有效市场。     

市场有效理论对我国股市发展的启示

股票市场是否有效是股票价格对市场信息的反应程度。根据对深沪股市1995年以检验表明,我国股市基本呈弱式有效市场。同时,运用市场有效理论有助于政府金融管理当局对股市的监管,也不利于我国股市发展中对机构投资的培育以及对个人投资的保护。     

股指分化比价重构——深沪股市运动的基本形式

深强沪弱的现状使我们很难找回过去沪强深弱的一些习惯性市场感觉,而面对的是更富市场机遇的深沪股市的结构性分化与重组。 A.深沪股市股指的分化与重组 指数代表着股市运行的风向标,也是股票投资者判断与投资的工具。深股现有指数的多重组合,沪市7月1     

公司控制权市场与证券市场效率

随着证券市场在我国市场经济体系中核心地位的日益凸显,以及我国股市中诸多不规范问题的暴露,理论界对我国证券市场的效率给予了较多的关注和探讨.许多学者从"有效市场假说"出发,运用实证方法检验我国股票市场的效率,得出"弱态有效"的结论.本文从公司控制权市场理论出发,强调探讨我国股票市场效率的基本学术范畴,不是"有效市场假说",而是公司控制权市场理论.在我国制度变迁的大背景下,公司控制权市场作为证券市场重要的功能模块,其发展规范程度从根本上决定了证券市场的效率.     

中国股票市场的渐进有效性研究

本文研究了中国股市是否弱式有效。不同于传统的检验方法 ,本文的实证分析运用了特别适合于转轨经济体中新兴股市的渐进有效性检验 ,该方法采用时变系数的AR( 2 )自回归模型 ,同时考虑到“波动集群”的异方差影响 ,更能清晰地反映出市场有效性的动态演进过程。加之分年度检验的结果 ,我们有把握认定中国股市从 1 997年开始呈现弱式有效。     

我国证券市场效率的分析

<正> 实践中,投资者都力图获取最大的收益,或追求超出平均收益的收益。从理论上来说,若证券市场上的有关信息对每个投资者都是均等的,而且每个投资者都能根据自己掌握的信息及时地进行理性的投资决策,那么任何投资者都不能获得超额收益。这种市场被称为“有效市场”。由此可见,证券市场效率的高低是衡量证券市场信息分布和流速、交易透明度和规范程度的重要标志,也是证券市场成熟与否的重要标志。在我国,证券市场弱型效率的研究刚开始,取得了一定的经验。目前,对我国证券市场是否达到弱型效率这一问题仍有争议。1994年俞乔在《经济研究》发表研究上海和深圳股市弱型效率的论文,分析上海和深圳的股市综合指数自1990年12月29日至1994年4月28日的变动趋势,其实证研究表明深、沪市场均不具有弱型     

我国房地产税制的现状及改革构想

房地产税制是维护房地产市场公平竞争，实现国家对房地产业宏观调控的有力杠杆。然而，我国现行的房地产税制却存在税费不分、税制不统一、税制结构不合理等诸多问题。严重影响了其对房地产业应有的宏观调控作用。因此，适时地推进房地产税制的改革应是当务之急，应统一内外税制，合理界定税费的范围，建立统一、规范、合理的房地产税收体系。     

The Change in Productive Efficiency in Telecommunications in the United States

The question addressed here is whether the adoption of incentive regulation, which has become an important regulatory tool in the telecommunications industry in the USA, has resulted in a change in the technical efficiency of local exchange carriers in the USA. After providing an overview of the nature of incentive regulation, a methodology for measuring technical efficiency and its change is introduced. This is a multiple-output/multiple-input distance function approach to measuring technical efficiency. The results of implementing this approach for 19 local exchange carriers for the 1988–2001 period indicate that in the production of local service, intrastate toll/access service, and interstate access to local loops, there was no change in technical efficiency between the 1988–1990 period and the 1991–2001 period, something that incentive regulation was specifically designed to promote.     

The Change in Productive Efficiency in Telecommunications in the United States

The question addressed here is whether the adoption of incentive regulation, which has become an important regulatory tool in the telecommunications industry in the USA, has resulted in a change in the technical efficiency of local exchange carriers in the USA. After providing an overview of the nature of incentive regulation, a methodology for measuring technical efficiency and its change is introduced. This is a multiple-output/multiple-input distance function approach to measuring technical efficiency. The results of implementing this approach for 19 local exchange carriers for the 1988-2001 period indicate that in the production of local service, intrastate toll/access service, and interstate access to local loops, there was no change in technical efficiency between the 1988-1990 period and the 1991- 2001 period, something that incentive regulation was specifically designed to promote.     

西部地区人力资本投资与知识化发展

人力资本投资在推动知识化发展的过程中存在自增强机制，通过促进人力资本保值增值，进行人力资源合理配置，改善配置环境和配置政策、完善配套措施，有助于充分发挥这一机制的功能，从而实现西部地区知识化发展。     

Payment Systems in Countries in Transition

MOCT-MOST: Economic Policy in Transitional Economies -     

Inequalities in Income Distribution in Slovenia

This article presents an empirical analysis of income distribution based on income tax data for Slovenia in 1991-2000. It presents evidence of rising inequalities in income distribution (gross income, gross wages and pensions). These results are supported by coefficients of variation, Gini coefficients and by the Lorenz curves. Inequalities increased rapidly in the 1991 to 1993 period. After a significant decrease in 1994 and a steady increase from 1995 to 2000, the peak value from 1993 was not surpassed. Atkinson's requirements for dominance comparisons are not violated. Inequalities are also present in the distribution of the benefits of economic growth among income groups.     

上海生态农业发展影响因素研究

文章分析了上海生态农业发展的影响因素,并利用计量模型进行检验,认为影响上海生态农业发展的主要因素有农业基础设施、农业劳动力资源、农业产业化水平、农业科技实力状况。     

Age Discrimination in Employment in Canada

Issues pertaining to age discrimination in employment in Canada are analyzed with a view toward highlighting lessons that may be learned from the Canadian experience—an experience that is taking on increased policy importance. Reasons for the increased attention to age discrimination issues are outlined, followed by a portrayal of the age discrimination legislation and court interpretations in Canada, especially as they pertain to mandatory retirement. Enforcement aspects are discussed, as is the evidence on age discrimination in employment and the effectiveness of legislation with respect to age discrimination and mandatory retirement. The article concludes with a discussion of the lessons to be learned from the Canadian experience, especially with respect to the poorly understood but complicated relationship between age discrimination and mandatory retirement. Policy recommendations for strengthening age discrimination legislation are also outlined. (JEL J14 , J24 , J71 )     

Inter-enterprise arrears in economies in transition

In the context of economies in transition, the paper argues that an excessive liquidity squeeze could throw the economy into a persistent state of low economic activity. In such bad equilibrium, enterprise transactions become largely demonetized, with a chain of arrears, a form of involuntary credit, spreading over the entire system. The empirical analysis of the Romanian experience seems to support the view advanced in the paper.     

Issues in Childcare Policy in Australia

This article assesses the feasibility and desirability of a universal scheme of early childhood education for Australian children aged 3 and 4 years old.