Conditional design of the EWMA median chart with estimated parameters

The exponentially weighted moving average (EWMA) chart is often designed assuming the process parameters are known. In practice, the parameters are rarely known and need to be estimated from Phase I samples. Different Phase I samples are used when practitioners construct their own control chart's limits, which leads to the “Phase I between-practitioners” variability in the in-control average run length (ARL) of control charts. The standard deviation of the ARL (SDARL) is a good alternative to quantify this variability in control charts. Based on the SDARL metric, the performance of the EWMA median chart with estimated parameters is investigated in this paper. Some recommendations are given based on the SDARL metric. The results show that the EWMA median chart requires a much larger amount of Phase I data in order to reduce the variation in the in-control ARL up to a reasonable level. Due to the limitation of the amount of the Phase I data, the suggested EWMA median chart is designed with the bootstrap method which provides a good balance between the in-control and out-of-control ARL values.     

A comparative study of confidence intervals to assess biosimilarity from analytical data

Assessment of analytical similarity of tier 1 quality attributes is based on a set of hypotheses that tests the mean difference of reference and test products against a margin adjusted for standard deviation of the reference product. Thus, proper assessment of the biosimilarity hypothesis requires statistical tests that account for the uncertainty associated with the estimations of the mean differences and the standard deviation of the reference product. Recently, a linear reformulation of the biosimilarity hypothesis has been proposed, which facilitates development and implementation of statistical tests. These statistical tests account for the uncertainty in the estimation process of all the unknown parameters. In this paper, we survey methods for constructing confidence intervals for testing the linearized reformulation of the biosimilarity hypothesis and also compare the performance of the methods. We discuss test procedures using confidence intervals to make possible comparison among recently developed methods as well as other previously developed methods that have not been applied for demonstrating analytical similarity. A computer simulation study was conducted to compare the performance of the methods based on the ability to maintain the test size and power, as well as computational complexity. We demonstrate the methods using two example applications. At the end, we make recommendations concerning the use of the methods.     

The impact of the European Youth Guarantee on active labour market policies: A convergence analysis

The European Union’s (EU) Youth Guarantee aims to improve the labour market situation of young people. Rather than prescribing a uniform policy model, it acknowledges that supportive measures need to align with national, regional and local circumstances. It thus seeks to promote mutual policy learning through the open method of coordination. As an innovative measure, the EU has deployed funding programmes to support the domestic measures related to the Youth Guarantee. We therefore examined in this study whether this mix of recommendations and financial incentives has entailed a convergence of member state policies. Our analysis of policy outputs for the period 2007?2014 yields a mixed empirical picture. There is catching‐up convergence regarding policies’ sectoral coverage but increasing divergence concerning the number of adopted policy instruments. The first two years of financial incentives did not produce any effect on enhancing policy experimentation among less active member states. We offer an optimistic and a pessimistic interpretation of these findings.     

一种考虑风险的项目活动持续时间的估算方法

在介绍PERT网络模型基础上 ,从影响项目工期的风险因素出发 ,分析风险因素对项目活动的影响 ,提出了一种新的项目活动持续时间的估算方法 ,通过多次模拟确定项目持续时间分布和期望工期 ,并可找出影响项目工期最大的因素。     

论当前我国制度供给现状及制度变迁方式的转换

制度变迁方式的不同,制度结构也就会有差别。需求诱致制度变迁的长期使用可能会出现核心制度缺失而导致制度供给陷阱,强制性制度变迁也可能因为供给与需求出现错位,导致严重的制度结构不均衡,这就对研究制度变迁方式及其运用规律提出了要求。本文通过对典型的需求诱致制度变迁———农业经济体制改革和典型的强制性制度变迁———国有企业制度改革进行实证分析,表明了制度变迁方式的交替使用能够较好地避免制度供给跌入陷阱,而且制度变迁的及时转换还能够有效地实现新的制度均衡。     

民俗志的学术定位和书写

本文对近年来民俗志书写理论和实践上的一些新探索作了初步梳理,指出了"标志性文化统领式民俗志"对于创新民俗志书写模式、增强民俗志书写主位视角和对话功能的意义以及"感受之学"在探寻民俗志独特学科品格上做出的探索和努力.     

流程CIMS项目经济评价方法研究

计算机集成制造系统(CIMS)是一种新型生产管理模式,但由于流程工业企业CIMS工程项目投资大、风险大,开发一种合理评价流程CIMS项目的经济评价方法已是十分必要.文章分析了流程CIMS项目经济评价的特点和各种先进制造技术的评价方法,提出采用效用叠加模型与层次分析法结合起来构成的复合评价方法对流程CIMS项目进行经济评价,并简介了该方法的运用模式,为流程企业实践提供参考.     

可持续发展与会计理论研究方法的选择

随着经济的高速增长与环境保护、社会发展的矛盾日益突出,人类提出了建立在资源、环境、经济和社会相协调基础上的可持续发展战略。这种新的发展观必然对传统会计理论及其研究方法产生冲击。在现有的各种会计理论研究方法中,社会学法正是与可持续发展要求相一致的,其必将对会计理论的发展产生深远的影响,有着广阔的应用前景。     

加强领导干部理论学习 切实提高理论学习效果

全面建设小康社会,推进社会主义现代化建设,关键在于提高党的各级领导干部的素质。而提高领导干部理论学习的效果是提高领导干部素质的必由之路。要保证领导干部理论学习的效果,首先要使领导干部从国际、国内形势和领导干部自身状况来充分认识搞好理论学习的重要意义;其次是选择正确的理论学习方法和途径,从理论学习的实践来看,集中培训、系统学习,集中面授、重点辅导,普遍号召、分层研读,施加压力、促进自学等都是行之有效的方法;最后要有保证理论学习效果的有效措施。这就要制定和完善包括领导干部脱产进修制度、中心组学习制度、干部在职自学制度、考核制度等一整套的制度体系。