A Bias–Reduced Log–Periodogram Regression Estimator for the Long–Memory Parameter

In this paper, we propose a simple bias–reduced log–periodogram regression estimator, ^d_r, of the long–memory parameter, d, that eliminates the first– and higher–order biases of the Geweke and Porter–Hudak (1983) (GPH) estimator. The bias–reduced estimator is the same as the GPH estimator except that one includes frequencies to the power 2k for k=1,…,r, for some positive integer r, as additional regressors in the pseudo–regression model that yields the GPH estimator. The reduction in bias is obtained using assumptions on the spectrum only in a neighborhood of the zero frequency. Following the work of Robinson (1995b) and Hurvich, Deo, and Brodsky (1998), we establish the asymptotic bias, variance, and mean–squared error (MSE) of ^d_r, determine the asymptotic MSE optimal choice of the number of frequencies, m, to include in the regression, and establish the asymptotic normality of ^d_r. These results show that the bias of ^d_r goes to zero at a faster rate than that of the GPH estimator when the normalized spectrum at zero is sufficiently smooth, but that its variance only is increased by a multiplicative constant. We show that the bias–reduced estimator ^d_r attains the optimal rate of convergence for a class of spectral densities that includes those that are smooth of order s≥1 at zero when r≥(s−2)/2 and m is chosen appropriately. For s>2, the GPH estimator does not attain this rate. The proof uses results of Giraitis, Robinson, and Samarov (1997). We specify a data–dependent plug–in method for selecting the number of frequencies m to minimize asymptotic MSE for a given value of r. Some Monte Carlo simulation results for stationary Gaussian ARFIMA (1, d, 1) and (2, d, 0) models show that the bias–reduced estimators perform well relative to the standard log–periodogram regression estimator.     

商业银行顾客满意度的多层次模糊评价研究

运用模糊数学理论在已有的商业银行顾客满意度评价指标体系基础上,提出了一种全新的商业银行顾客满意度评判方法——模糊综合评判法,该方法能够比较客观公正地对商业银行顾客满意度进行评价,为商业银行全面质量管理评估的开展提供新的可行性评价方法,并通过实例验证了该方法的有效性。     

大学生宿舍人际关系质量调查分析

采用问卷法和社会测量法,调查研究大学生宿舍人际关系质量。对592名被试的研究结果表明：大学生宿舍人际满意度总体较高,倾向于满意的比例约为81.42%;大学生宿舍人际被接纳指数普遍较高,属于受欢迎和较受欢迎的比例约为88.85%;大学生宿舍人际满意度与被接纳指数呈极显著正相关;大学生宿舍人际关系质量由高到低依次为大四、大一、大三和大二。     

网络环境版权相关法律问题

版权保护制度受技术发展的影响极大。数字传播技术和因特网的广泛使用,打破了版权法的利益平衡,对版权法的主要概念以及版权人的相关经济权利造成了一定的影响。在网络环境中,作品具有更大的开放性,因而具有极强的、难以克服的外部经济效果,版权人排除他人对作品进行使用的成本极高。在网络环境中,网络作品的私有将变得非常困难,网络环境中版权制度的走向是,版权将变为一种公共权利,作品由政府提供将是惟一的选择。     

城中村更新住房补偿基底选取及村民政策满意度研究

地方政府及开发商权衡城中村更新的经济成本后形成以家庭人口或农房初始 面积为基底的补偿策略.两类补偿分别侧重村民的成员权和住房资产累积量,相对获益群 体及村民政策满意度存在分化,识别其差异及关联性可为缓解补偿纠纷及后续政策优化提 供参考.本文在武汉市开展城中村更新的典型调查,比较住房补偿基底选取对村民住房资 产及政策满意度的影响.研究表明:(１)按家庭人口补偿的村民家庭户均还建住房较初始农 房面积减少１２９．８０m２,而按住房初始面积还建的村民家庭住房面积与更新前变化不大,仅 减少１４．７４m２.(２)按人口补偿城中村更新还建后村民家庭之间的住房资产趋近,相对剥 夺指数从０．４１降至０．１０;按住房面积补偿的城中村村民的住房资产相对剥夺指数则从０．５１ 提升到更新后的０．５４,家庭之间的住房资产差距略有增强.(３)按人口补偿使城中村原农房 面积低于４００m２ 的村民家庭住房面积有较大增加,其政策满意度高;而按住房初始面积还 建的城中村,原农房面积在２００m２ 以下的村民家庭相对受损,还建后住房资产相对剥夺指 数增加,其政策满意度低.(４)人口补偿方案考虑到原农房面积较低家庭宅基地的空间发展 权,同时避免对抢建加盖等形成的超额面积过度补偿;按住房初始面积补偿则有利于原农房 面积较大的村民家庭,但忽略了原农房面积较少家庭参与城中村更新宅基地增值收益分配 的权利.关键词 城     

Couples relationship standards and satisfaction in Pakistani couples

Relationship standards are beliefs about what is important in a satisfying couple relationship, which vary considerably between cultures, and might mean that what couples seek from couple therapy differs across cultures. We assessed the standards of n = 49 Pakistani couples and whether those standards predicted couple satisfaction. To provide referents for the Pakistani standards, we also assessed selfreported relationship standards in n = 33 Western couples and n = 30 Chinese couples. Pakistani couples endorsed couple bond standards (e.g., expressions of love) as similarly important, and family responsibility (e.g., extended family relations) standards as more important, than Western or Chinese couples. In Pakistani couples, Couple Bond predicted couples' relationship satisfaction, but family responsibility and Religion predicted only wives' satisfaction. Modest sample sizes necessitate caution in interpreting results but suggest existing couple therapies might need modification to address the distinctive relationship standards of Pakistani couples.     

中国外语院校非英语专业本科英语学习者对慕课学习认同感的实证研究——任务教学法视角

慕课教育对传统教学方式既是机遇也是挑战,越来越多的学习者通过慕课方式在网络等多元交互平台将英语学习延展的更加随时性,碎片化。本研究基于任务教学法理论,以问卷调查方式对中国外语院校非英语专业本科英语学习者通过慕课网络学习的满意度进行调查,探索其在学习意识、学习行为上对慕课英语课程学习的认同感和满意度,以及各个维度之间的差异,对英语类慕课课程的设置和开放提供借鉴。     

The consequences of job insecurity for employees: The moderator role of job dependence

With globalization and increased international competition have come more flexible forms of employment and increased job insecurity. The authors address the impact of perceived job insecurity on employees' work attitudes and intentions. After reviewing relevant research on stress theory and the relationship between job insecurity and its consequences, they test two hypotheses on 942 employees in Spain, namely: first, that job insecurity relates negatively to job satisfaction and organizational commitment and positively to intention to leave; and, second, that job insecurity, economic need and employability interact in the prediction of these outcomes.     

Marriage in the New Millennium: A Decade in Review

This review focuses on broad themes characterizing marital research in the past decade. In addition to continuing themes, such as a focus on conflict, violence, and impact on physical and mental health outcomes, we also address the impact of the Healthy Marriage Initiative on marital research and recent advances in methodology. We highlight an overarching theme that characterizes much of the literature: the importance of context in understanding marital outcomes and the impact of positive marital transactions and marital strengths. Given the increasing diversity of married couples, the attention given to context over the past decade has been timely and appropriate, providing an increasingly solid foundation for future research.