On the forecastability of share prices on the Viennese stock exchange

In this paper the Viennese stock exchange data are analysed by using ARMA and GARCH technology. After using AIC and BIC for estimating the linear structure of the time series, to the resulting innovations a GARCH(1,1) model is fit. The resulting residuals are then tested for serial independence and constancy of its distribution to check whether the models are reasonable. Main result is that the residuals of this ARMA-GARCH(1,1)-model are reasonably iid (which is checked by BDS and classical independence tests) for index data and significantly less well-behaved for stock data. Second, there is considerable autocorrelation in the data (especially in the Viennese indices WBK and ATX) which can be exploited even with 1.25% transaction costs (which is checked by a posteriori analysis of a strategy which exploits an underlying time-varying AR(1) model), however, much higher profit can be made with 0.5% transaction costs. Furthermore, the same techniques are applied to US Standard & Poor 500 index and the results for both data sets are compared giving the result that the US-market looks much more mature than the Viennese one.Financial Support by the Institute for Advanced Studies, Vienna, and the Fonds zur Förderung der wissenschaftlichen Forschung, Vienna, Grant P 9176 is gratefully acknowledged. This paper is a slightly abbreviated version of the Research Report No. 135 by the same authors (see References), which contains many detailed plots of the results.     

Adaptive market hypothesis: The story of the stock markets and COVID-19 pandemic

Since the level of markets’ information efficiency is key to profiteering by strategic players, Shocks; such as the COVID-19 pandemic, can play a role in the nature of markets’ information efficiency. The martingale difference and conditional heteroscedasticity tests are used to evaluate the Adaptive form of market efficiency for four (4) major stock market indexes in the top four affected economies during the COVID-19 pandemic (USA, Brazil, India, and Russia). Generally, based on the martingale difference spectral test, there is no evidence of a substantial change in the levels of market efficiency for the US and Brazilian stock markets in the short, medium, and long term. However, in the long term, the Indian stock markets became more information inefficient after the coronavirus outbreak while the Russian stock markets become more information efficient. Intuitively, these affect the forecastability and predictability of these markets’ prices and/or returns. Thereby, informing the strategic and trading actions of stock investors (including arbitrageurs) towards profit optimization, portfolio asset selection, portfolio asset adjustment, etc. Similar policy implications are further discussed.     

关于公有经济收入差别倒U理论的讨论与验证(上)

在经济发展方式逐步从增长型向分配型、从生产型向消费型、从建设型向民生型转变的过程中,回顾和总结学术界关于居民收入分配差别的讨论显然是必要的。文章从多个方面回顾、分析和考察了"公有经济收入差别倒U理论"这一理论模型提出后的争论焦点及演变过程,包括围绕这一理论所讨论的主要内容,比如有关公有制经济与私有制经济条件的比较分析,有关劳动差别、劳动供求、剩余/生计比以及农村收入差别大于城镇差别等两部门内部各种因素的趋势、二元结构部门转换影响收入差别的讨论,有关国有资本积累及改革引起的民营资本积累、税收政策和体制改革对收入差别变动趋势的影响的讨论,以及这一理论在中国的验证等。分析表明,目前中国居民收入差别还在沿着公有经济收入差别倒U曲线的前半段逐步呈"阶梯形"上升,但上升的势头已经趋缓,并且个别方面比如城市化等因素导致的收入差别已经初现下降趋势。     

中国股市价值反转投资策略有效性实证研究

本文以中国深沪A股股票市场为考察对象 ,分析了价值反转投资策略的有效性。作者通过实证分析发现 :在中国深沪A股股票市场上 ,以帐面价值与市场价值比 (B M)、B M GS等指标构造的价值反转投资策略可以产生显著的超额收益率 ,并且其显著程度因持有期不同而不同。接着 ,作者利用CAPM模型、Fama French三因素模型并引入了协偏度 (coskewness)和协峰度 (cokurtosis) ,构造出多风险因子模型来解释价值反转投资策略超额收益率。我们发现 :在经过传统风险因素调整后 ,价值反转投资策略效果依然明显 ;CAPM模型无法解释价值反转投资策略超额收益率 ;Fama French三因素模型对价值反转投资策略超额收益率的解释能力最为显著 ,但对于有些价值投资策略 ,在Fama French三因素基础上加上协偏度和协峰度因子后 ,模型的解释能力有所提高     

Trade and Specialisation in Pollution Intensive Industries: North–South Evidence

Abstract

The pollution haven hypothesis (PHH) and the capital-labour hypothesis (KLH) state that the relative level of a country's environmental regulations and capital and labour endowments determines its comparative advantage respectively. Since these hypotheses lead to conflicting predictions as to whether the North or the South will specialise in pollution-intensive production, this paper examines whether changes in trade and specialisation patterns allow us to distinguish between pollution haven and factor endowment effects. We employ a methodology that enables us to present North-South trade patterns over time and to identify those periods when trade patterns were consistent with either the PHH and/or the KLH as a foundation for undertaking more detailed econometric studies.     

Nonparametric fixed effects model for panel data with locally stationary regressors

We develop methods for inference in nonparametric time-varying fixed effects panel data models that allow for locally stationary regressors and for the time series length $T$ and cross-section size $N$ both being large. We first develop a pooled nonparametric profile least squares dummy variable approach to estimate the nonparametric function, and establish the optimal convergence rate and asymptotic normality of the resultant estimator. We then propose a test statistic to check whether the bivariate nonparametric function is time-varying or the time effect is separable, and derive the asymptotic distribution of the proposed test statistic. We present several simulated examples and two real data analyses to illustrate the finite sample performance of the proposed methods.     

The Development of Community Tourism： A Relational View of Development Economics

By adopting the research method of documentary research, combining the related theory of development economics, and starting with the concept of community tourism, this paper brings forward the ＂Dual Structure＂ and the Kuznets Hypothesis of community tourism, and defines ＂the game theory＂ between the residents of community and tourists, as well as the increasing relationship between the per capita tourism income of community and the Geordie Modulus of community. Conclusively it puts forward the way of developing the tourism and community harmoniously, namely, taking the human as the dominant factor and being joined by the community.     

基于自由现金流量假说的盈余管理动因研究——来自中国上市公司的经验证据

基于代理成本理论及自由现金流量假说分析框架,研究了我国上市公司自由现金流量引发的盈余管理行为,并以2004~2006年我国A股上市公司为样本,运用面板数据分析方法进行了相应的实证研究。研究发现,自由现金流的代理成本是激发我国上市公司管理者进行盈余管理的重要原因;企业债务对自由现金流引发的盈余管理行为具有一定的抑制作用,但债务的软约束现象仍然存在。     

风险投资参与对中资企业首次公开发行折价的影响——不同证券市场的比较

本文考察中资企业在不同市场上市时风险投资的参与是否影响首次公开发行折价。研究发现,在大陆中小板和香港主板市场上市的中资企业中,有风险投资参与的企业IPO折价显著高于无风险投资参与的企业,支持声誉效应假说,即风险投资机构以IPO折价来提早退出投资项目,以此来建立自己的声誉,吸引更多的资金流入。在美国市场风险投资的参与对IPO折价则没有显著影响。本文进一步研究发现从业时间短的风险投资机构,其参与投资的公司上市时的历史也较短;风险投资进入企业的时间越长,IPO折价水平也越高。这两个检验都验证了风险投资机构通过IPO折价提早退出投资项目,进一步支持了声誉效应假说。     

一种基于族类划分理论的保险营销信息获取方式研究

保险营销中的传统信息获取模式存在弊端,本文提出一种假说,利用历史资料推断客户的保险购买模式,从而获得客户更加完整的购买信息。这首先需要对商品进行族类划分。本文探讨了一种创新型的商品族类划分的基本理论以及操作方法,并对其方法进行了部分检验。