A Framework for Reconsidering the Lake Wobegon Effect

The Lake Wobegon Effect (LWE) describes the potential measurement-error bias introduced into survey-based analyses of education issues. Although this effect potentially applies to any student-report variable, the systematic overreporting of academic achievements such as grade point average is often of preeminent concern. This concern can be easily circumvented if official records data are available; however, many researchers can only access student-reported data. In this article, the authors examine whether using student-survey data in place of official records data meaningfully biases regression estimates. They motivate their contribution by noting a useful statistical feature of overreporting on bounded variables such as grade point average. Specifically, the misreports will be negatively correlated with the true grade point average, yielding a form of nonclassical measurement error that actually counteracts the bias. The authors connect this observation to reliability ratios used in labor economics, which are simple ways to adjust for attenuation bias, when needed. In two applications, we find that it is unnecessary to correct for the LWE bias because it is so small.     

成型设备增塑剂系统电气控制可靠性探讨

文章通过介绍成型设备增塑剂系统的流程和控制方式,运用可靠性理论,完善其控制和检测,并结合设备的实际情况,提出改进的具体方法。     

Determinants of attitudinal loyalty in Nigerian telecom service sector: Does commitment play a mediating role?

This paper explores the mediating role of commitment in the relationships between service assurance, service reliability and attitudinal loyalty. A quantitative cross-sectional data generated from 138 experienced users of telecommunication services formed the final database. Attitudinal loyalty was found to be a process-based construct that starts from service assurance and proceeds to service reliability and finally to customer commitment and loyalty. The entire process explained 69 per cent of the total variance in attitudinal loyalty. The relationship between service assurance and attitudinal loyalty was insignificant. No support was found for the proposed mediating role of customer commitment in the relationship between service assurance and attitudinal loyalty. In contrast, the relationship between service assurance and attitudinal loyalty was fully mediated by service reliability. Finally, service reliability was both directly and indirectly related to attitudinal loyalty through customer commitment. To attract customers' attitudinal loyalty therefore, services companies especially those within the low-contact service category must deliver reliable services and make efforts to assure customers that their services are reliable. The implications for customer loyalty theory and future research are also discussed.     

PASS MO在110kV变电站中应用的可行性

文章对PASS（Plug and Switch Switchgear,简称PASS，是ABB公司生产的插接式开关装置）的改进型PASS MO的特点进行分析，探讨在110kV电压等级采用该设备的可行性。     

基于可靠度理论的小城镇工程结构抗灾设计体系

文章提出了小城镇工程结构抗灾设计的目的、原则,为小城镇的抗灾设计提供了切实可行的设计准则,分析并提出了小城镇工程结构抗灾性能指标体系,为小城镇工程结构抗灾可靠度的理论分析提供了分析变量,建立了在各种灾害作用下小城镇工程结构抗灾可靠度理论的分析模型,为小城镇基础设施的防灾减灾的进一步研究提供理论依据。     

提高分层注水管柱工作可靠性

通过对胜利油田分层注水工艺现状进行调研,对影响分层注水管柱工作可靠性的因素进行了分析,找出了造成分层注水管柱层段合格率低的主要因素是管柱的结构及井下配套工具的质量及使用性能问题。针对存在的问题,通过分析,提出了提高分层注水管柱工作可靠性的有效途径,并进行了应用试验,对实施情况进行了介绍,验证了提高分层注水管柱工作可靠性的途径。     

我国公允价值会计计量的应用研究

随着我国市场经济发展以及我国会计与国际会计的接轨,对公允价值会计计量的研究也在逐渐兴起。新的会计准则对公允价值计量属性的再次引入,有必要对公允价值在我国的应用作深入细致的研究。笔者在探讨公允价值在我国会计准则中的应用现状的基础上,分析了存在的问题,并提出了相应的对策。     

权益资本成本估计方法的可靠性检验研究——基于中国资本市场数据的经验证据

近年来,权益资本成本的相关研究成为会计领域乃至经济金融领域的热点。然而,关于上市公司权益资本成本的科学估计问题却一直是相关实证研究的难题。在此背景下,论文对权益资本成本的概念及其估计方法的发展过程进行了系统梳理,并在此基础上对目前学者们最为认可和广泛应用的三种内涵权益资本成本估计模型进行了具体介绍,最后基于中国资本市场2007-2008年上市公司数据,利用两种通用的检验方法对估计得到的权益资本成本变量进行了可靠性检验。结果表明,基于Easton（2004）的以内涵报酬率作为权益资本成本代理变量的估计方法具有最好的可靠性。     

由“日本大地震”引发的中国工程可靠性及其管理问题的思考

从日本大地震引出工程可靠性的话题,阐释了可靠性工程、可靠性技术和可靠性管理的涵义及其相互关系;通过具体真实的案例介绍了中国现阶段工程可靠性方面的问题现状,并针对案例进行总体的分析和讨论,指出中国现阶段工程可靠性问题产生的主要原因在于:全民的可靠性意识不强、工程可靠性管理体制不健全、可靠性管理资金不落实、工程可靠性管理理论研究滞后等;强调在中国现阶段,可靠性管理比可靠性技术更加需要引起重视,加强可靠性管理有可能会产生出超预期的效果。     

监理人员绩效考核的信度与效度分析

监理企业作为一种有偿性技术服务行业,其向市场提供服务的价值载体-一监理人员对监理项目的成败及企业口碑、品牌的打造都有着重要的意义.建立一套完善的监理人员绩效考核体系,并有效地贯彻执行该体系已成为很多监理企业的迫切诉求.基于对监理人员进行绩效考核的重要性和考核过程中大量不确定因素的存在,对监理人员绩效考核的信度和效度验证分析方法进行了研究,提出了离散程度分析和评价主体一致、有效性分析的信度检验方法,以及兼顾绩效考核内容与结构两方面的效度分析方法.该研究成果因其简单、实用且可操作性强的特点,将对监理企业的人事管理工作具有很强的指导意义.