Addition of runs to an s-level supersaturated design

The purpose of the present work is to extend the work of Gupta et al. (2010) to s  -level column balanced supersaturated designs. Addition of runs to an existing E(χ²)-optimal$E({\chi }^2)\mathrm{-}\mathrm{optimal}$ supersaturated design and to study the optimality of the resulting design is an important issue. This paper considers the study of the optimality of the resulting design. A lower bound to E(χ²)$E({\chi }^2)$ has been obtained for the extended supersaturated designs. Some examples and a small catalogue of E(χ²)-optimal$E({\chi }^2)\mathrm{-}\mathrm{optimal}$ supersaturated designs are also presented.     

军人电子健康档案互联互通性相关标准概述和应用建议

在介绍互联互通性概念的基础上,分析了电子健康档案互联互通性标准的分类和引用关系,并分别对互联互通性标准的3个层次,即信息集成规范、信息模型标准和信息语义标准的主要代表性标准的内容和典型应用进行了综述,提出了在军人电子健康档案系统建设中如何运用上述标准的建议。     

Virtual Social Work Education—Theory and Experience

This paper critically analyses the experience of providing social work education over the Internet. It argues that the interactivity and responsivity integral to e‐learning are significant capabilities that can facilitate the kind of student centred learning in social work that is consonant with the emerging consensus on effective educational and professional practices. Associated with this it argues that e‐learning better provides equality of access and opportunity to a diverse range of students to pursue social work education through the creation of critical mass and technological adaptations to diverse needs. Research with a group of students who have pursued online learning is presented. The research indicates that though e‐learning is largely considered a positive and enabling experience by students, it is still experienced as isolating by most. A balance therefore needs to be struck in future between face to face and online interaction ensuring students are not isolated and that infrequent use of e‐learning does not delay engagement with the medium and the passing of online developmental milestones. This paper concludes that there is a longer term future for e‐learning within social work education but that this future needs to be based on androgenic constructivist strategies to student learning and a responsive blend of online and physical interactivity.     

高职体育教师职后可持续发展现状研究

高职实用性体育是培养高职学生综合素质的重要组成部分,而高职体育教师职后可持续发展现状并不乐观,绝大部分高职体育教师缺乏与外界沟通交流、学习培训的机会,因而很难将职业实用性体育真正落到实处,限制了高职实用性体育在培养学生职业体能中的作用。高职实用性体育想要发展,建立系统的高职体育教师职后可持续发展环境刻不容缓。     

论网络消费法律问题及其解决对策

在互联网飞速发展的今天,各个商业领域都充斥着电子商务网络,这不仅催生了消费者的个人利益扩展空间和网络参与空间,还诱发了许多网络消费法律纠纷。故我国需要依法设置保护消费者权益的政府专门机构,强化政府的消费者保护义务,加强公众传媒的社会监督力度,强化网络参与者网络言行的法律责任和道德评判,制定、修订和完善相关立法,建立和健全我国电子商务中消费者保护制度。     

Return and volatility interaction between oil prices and stock markets in Saudi Arabia

The paper aims at investigating the links between world oil price and stock sector markets in Saudi Arabia over the weekly period from January 10, 2007 until September 28, 2011. To that effect, we make use of the VAR-GARCH process developed by Ling and McAleer (2003), which has the advantage to address the issue of return and volatility spillovers among the series we consider. Globally, the empirical findings show evidence of return and volatility transmission between oil price and stock sectors. However, the spillover effects are unidirectional from oil to some sectors for returns, but bidirectional for volatility patterns with more apparent links from sectors to oil. The optimal weights and hedge ratios for oil/stock portfolio holdings are sensitive to the sectors considered, and allow a better understanding of the links between sectors and oil for investors who seek for investment opportunities and want to diversify their portfolios. The findings are of great interest and have important implications for investors, market participants and policy makers.     

The long-run impact of inflation in South Africa

This paper evaluates the hypothesis of long-run super-neutrality of money (LRSN) within the context of the South African economy. The long-run impact of inflation on the interest rate and subsequently, output is estimated by employing a trivariate structural vector autoregression model, using quarterly data for the period of 1960:1 to 2010:1. The estimation results suggest that the hypothesis of LRSN cannot be rejected, thereby suggesting that monetary policy in South Africa cannot be used to solve the large and persistent unemployment problem in South Africa, which is understandable, since unemployment is inherently structural and is due to skills-shortage. This is further supported by our one of our other results which shows that significant long-run impact on output is obtained from technological improvements.     

Gender-specific differences in labor market adjustment patterns: Evidence from the United States

Do men and women behave differently while adjusting labor supply over the business cycle? Using data from the United States, we show that women are significantly more likely to adjust along the intensive margin (number of hours), while men adjust more along the extensive margin (employment). Older, single, and divorced/widowed adjust predominantly along the extensive margin.     

AN INTERNATIONAL COMPARISON OF LIFETIME INEQUALITY: HOW CONTINENTAL EUROPE RESEMBLES NORTH AMERICA

We compare earnings inequality and mobility across the United States, Canada, France, Germany and the United Kingdom during the late 1990s. A flexible model of earnings dynamics that isolates positional mobility within a stable earnings distribution is estimated. Earnings trajectories are then simulated, and lifetime annuity value distributions are constructed. Earnings mobility and employment risk are found to be positively correlated with base‐year inequality. Taken together they produce more equalization in countries with high cross‐section inequality such that the countries in our sample have more similar lifetime inequality levels than cross‐section measures suggest.     

OIL AND THE MACROECONOMY: A QUANTITATIVE STRUCTURAL ANALYSIS

We model an open economy where macroeconomic variables fluctuate in response to oil supply shocks, as well as aggregate demand and supply shocks generated domestically and abroad. We use several robust predictions of the model to identify five fundamental shocks underlying the fluctuations of the (real) oil price, the US activity and the global business cycle. The estimates show that supply shocks generated in the global economy explain the largest fraction of the oil price fluctuations, about four times more than canonical oil supply shocks. The correlation between oil prices and the US activity varies with the type of shock.