上海期货交易所的涨跌停板制度对波动性的影响

本文通过对上海期货交易所的三个品种的涨跌停板制度进行检验,检验方法为:从收益率所拟和的ARMA模型中滤出残差,进行波动率的GARCH模型回归。波动率模型中加入了哑元变量来体现涨停板对后一日波动的影响。实证结果显示,铜、铝、天然橡胶的涨跌停板本应显著地使收益率的波动率减小的作用未检验出,相反却得到涨停板使三个品种显著波动率增大的检验结果。是否需要扩大涨跌停板,提高市场效率?检验结果带给我们如何使涨跌停板制度趋于合理化的思考。     

我国证券市场股价运动非线性特征检验

文章首先运用ARMA模型对市场收益率序列和波动率序列去掉序列的线性相关,然后运用BDS检验法对我国证券市场的收益率序列和波动率序列是否具有非线性结构进行实证研究。检验结果发现:我国证券市场股价运动具有明显的非线性特征,拒绝了有效市场理论的基本假设。     

股市波动对利率期限结构长短期冲击分析

本文选取了2004-2008年的中国国债数据，在Nelson-Siegel模型的基础上，引入股市收益率，股市波动率以及GDP对水平因子、斜率因子以及曲率因子进行时间跨度由长到短的时间序列分析。分析结果表明宏观因素没有明显相关性。利用工具变量法,发现短期内曲率因子的波动可以被三因子的滞后以及股市波动良好解释，股市收益率对水平因子有着显著冲击，股市波动率对水平因子短期有着显著负影响，而长期影响为正。     

成交量能解释收益率的GARCH效应吗:中国市场的实证

GARCH模型所刻画的收益率波动集聚特性的理论解释归因于交易信息流量的自相关结构。本文把成交量及其滞后项作为交易信息流量的替代指标，将其引入条件方差的动态模型，试图检验成交量对收益率GARCH效应的解释作用，中国市场指数的实证发现务件波动与同期交易量呈显著正相关，表明交易量及其滞后项中附含有额外的关于股票收益率方差的信息，但收益波动持续性依然很强，意味着交易量可能并不能作为交易信息流量的完全替代，亦可能是波动持续背后可能还有其他未知的解释因素。     

泊松过程在证券投资分析中的应用

本文视证券价格的波动为动态的泊松过程,对中国证券投资市场的证券价格的变化规律进行了分析。在此基础上,计算出泊松过程理论下的证券价格的期望值、证券投资收益率的期望值、收益率的方差。通过区间估计选择证券,对其建立证券市场的投资组合模型,从而判断证券市场中长期的总体走势方向,为证券投资者买卖决策提供新的参考依据。     

加密货币量价关系研究 ——基于去趋势交叉相关分析和分位数回归的方法

本文以6个加密货币为研究对象,运用去趋势交叉相关分析（DCCA）方法研究加密货币量价交叉非线性相关性的非对称特征和局部时变特征,并且采用带有风险传导的多重分形去趋势交叉相关分析方法研究量价非线性传导关系,进而,运用分位数回归的方法研究量价交叉相关性和流动率、波动率之间的关系。分析结果显示：加密货币收益率和交易量变化率均表现出尖峰厚尾、有偏的分布特征;加密货币量价非线性相关性随着标度增大而增强;无论是收益率还是交易量变化率下跌时,量价交叉非线性DCCA系数更大;量价交叉相关性同时具有非对称性和时变特征。加密货币量价之间具有风险传导的相互影响关系。在整体阶段,除门罗币外流动率对量价交叉相关性具有促进作用;波动率只对比特币有抑制作用。牛市期间流动率抑制而波动率促进量价关系更加明显;而熊市期间波动率主要对瑞波币和莱特币量价关系起抑制作用,除“柚子”和门罗币外,流动率对量价关系起抑制作用。     

基于GARCH族模型的黄金价格收益率及波动性研究

文章应用GARCH族模型对黄金现货价格的收益率及波动性进行实证研究,实证结果表明黄金价格日收益率具有"尖峰厚尾"和"波动聚类"的特征。通过TGARCH及EGARCH模型发现我国黄金市场存在非对称性现象,正的冲击对黄金价格波动影响更大。     

中国股市三因子资产定价模型实证研究

本文研究沪深A股市场股票收益率的截面性质，并检验Fama，French三因素资产定价模型在中国A股市场的适用性。结果表明，沪深A股市场存在着公司规模效应和股东权益账面市值比效应。这种现象在公司规模较小、股东权益账面市值比较高的组合里表现尤其显著。基于市场组合、公司规模和股东权益账面市值比的三因素模型可以完全解释A股市场收益率的截面差异。并且，对不同分组方法和样本区间的稳健性检验表明，本文的结论不依赖于分组方法和样本区间。     

经济周期与证券市场波动关联性——基于向量SWARCH模型的新证据

本文认为关于经济周期与证券市场波动关联性研究结论的分歧源自仅注重样本区间内整体关联性的检验,忽视了分析经济增长不同阶段与证券市场波动的特定关联性。基于向量SWARCH模型,本文实证检验了我国GDP增长率与证券收益率间的关联性,结论表明,虽然“整体关联性”检验不支持经济周期与市场波动间存在显著相关性的结论,但“状态相关系数”却显示两者间的关联性具有“区制转移”特征,并体现了对前者依赖的“门限效应”和“非对称效应”。     

浅析中国股票市场的处置效应

处置效应它是1985年由Shefrin与Statman根据观察到的现象提出.他们发现投资者在买卖股票时往往会选择将亏损股票持在手中,而相反在盈利时倾向于卖出股票,具体表现为当股票价格上涨时,投资者卖出盈余股票,在股票价格下降时反而将股票牢牢持有在手中,最终造成了巨大亏损.Shefrin和Statman便将投资者这种行为倾向称为处置效应.处置效应自从被提出后,多数学者对其进行理论解释与实证检验,成果颇丰.最常用的几种理论解释分别是前景理论、 后悔理论、 均值回归理论、 自我辩解.     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Incumplimiento del salario mínimo en Europa central y oriental

En este estudio se analiza el incumplimiento del salario mínimo durante el periodo 2003–2012 en diez países de Europa central y oriental con salario mínimo obligatorio nacional. A partir de los datos de EU‐SILC y la metodología propuesta por Bhorat, Kanbur y Mayet (2013), se cuantifica la incidencia y magnitud del incumplimiento. Se realizan análisis de regresión sobre determinantes individuales, laborales y macroeconómicos. Aunque la incidencia permanece relativamente baja, los trabajadores a los que se dirigen las políticas de salario mínimo parecen los más expuestos a su incumplimiento. Con el tiempo, una mayor incidencia se asocia a una razón más alta entre salario mínimo y salario medio.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Cultural Economy Planning in Creative Cities: Discourse and Practice

While a growing body of research analyses the functional mechanisms of the cultural or creative economy, there has been little attention devoted to understanding how local governments translate this work into policy. Moreover, research in this vein focuses predominately on Richard Florida's creative class thesis rather than considering the wider body of work that may influence policy. This article seeks to develop a deeper understanding of how municipalities conceptualize and plan for the cultural economy through the lens of two cities held up as model ‘creative cities’ — Austin, Texas and Toronto, Ontario. The work pays particular attention to how the cities adopt and adapt leading theories, strategies and discourses of the cultural economy. While policy documents indicate that the cities embrace the creative city model, in practice agencies tend to adapt conventional economic development strategies for cultural economy activity and appropriate the language of the creative city for multiple purposes.     

Input/output ranges and performance: an examination of US machine tool producers

Despite the establishment of high-tech multinational enterprises (MNEs) in Ireland since the late 1950s, the country did not succeed in closing the technological gap with most of its EU counterparts. The weak National System of Innovation (NSI), and in particular low business and government R&D levels, combined with a lack of research and technology linkages between MNEs and indigenous firms, explain these poor results. However, the Shannon region in the West of the country presents some specific institutional characteristics that could theoretically make the region a strong technological enclave. The various actors in the region - i.e. the administrative, financial, political and research institutions, as well as the business organizations - have indeed infused a new type of economic development. After a brief review of the available concepts and models articulated around these actors and their interrelationships, the paper analyses whether the Shannon region, taken as an illustrative example, mirrors a specific economic and technological localized setting. The study is based on a survey of indigenous and foreign firms.     

Sixty years of discrimination and diversity research in human resource management: A review with suggestions for future research directions

This article reviews discrimination and diversity research published in Human Resource Management (HRM) over the past 60 years. While discrimination and diversity are very different constructs, it is often informative to study them together, because when people recognize each other's diversity, this can result in bias, stereotyping, and discrimination. We conducted bibliographic searches for terms related to discrimination and diversity as well as a manual search through every title and abstract published in HRM over the last 60 years to assess article relevance. The search resulted in 135 research articles with 136 unique studies (i.e., samples) which are reviewed in this article. Sex and race are the demographics that have been examined the most in HRM, while religion has been examined the least. Moreover, the number of studies examining lesbian, gay, bisexual, transgender, and queer (LGBTQ) employees in the workplace in HRM has grown quickly within the past 10 years, culminating in a recent meta‐analysis. Our review looks at some of the earliest research published, the most recent research published, and the overall trends we identified in the research over the years for both discrimination and diversity articles. We then make future research suggestions and recommendations to advance the study of discrimination and diversity in the coming years.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.