Cointegrated systems II

The three invited papers in this special issue of Econometric Reviews on "Cointegrated Systems II" complement the previous special issue of the journal. The paper by Eric Zivot and Peter Phillips provides a comprehensive Bayesian analysis of trend determination in economic time series. Two interesting comments on some aspects of current research involving cointegration and the modelling of dynamic economic relationships are provided by Clive Granger and Denzil Fiebig.     

Amemiya‘s generalized least squares and tests of overidentification in simultaneous equation models with qualitative or limited dependent variables

Amemiya's generalized least squares method for the estimation of simultaneous equation modeis with qualitative or limited dependent variables is known to be efficient relative to many popular two stage estimators. This note points out that test statistics for overidentification restrictions can be obtained as by-products of Amerniya's generalized least squares procedure. Amemiya's procedure is shown to be a minimum chisquare method. The Amemiya procedure is valuable both for efficient estimation and for model evaluation of such models.     

深度阅读视域下幼儿园故事剧课程活动实施策略——以中班故事剧《今天运气怎么这么好》为例

摘 要:借鉴深度阅读理念，以故事剧《今天运气怎么这么好》为例，将实施深度阅读的“三个流程、三个关键词、两种能力”融合于故事剧课程活动的建构，改变传统故事学习、故事表演中重形式轻实质、重表面轻内在的弊端。整个过程凸显幼儿与故事、与环境、与成人的充分互动，重视教师的支持作用，让教师成为指导幼儿深度阅读活动的关键因素，陪伴幼儿深度卷入阅读世界，共同留下精彩足迹。     

Bibliometric analysis of production planning and control (1990–2016)

Production Planning and Control (PPC) has been one of the primary publishing outlets for operations management research for nearly three decades. This paper presents bibliometric analysis of the journal from its inception through 2016. PPC was analysed from six different perspectives to provide reliable and in-depth information about the journal’s performance and development. The analysis considered the development of the journal itself, the countries of contributing authors, authors’ academic and practitioner organisation affiliations, the top publishing and most cited authors, the most cited articles, and finally the topics of published papers through analysis of titles, keywords and abstracts. It was found that the journal is considered an outlet for both practice and academic research, reflecting changes over time in the landscape of operations management.     

提高高校学报质量之我见

高校学报的质量主要由其刊用稿件的学术水平高低和编辑工作的质量高低所决定。因此,探讨高校学报的内在质量要求和编辑的自身素质要求,对提高高校学报的质量十分必要。     

《内蒙古工业大学学报》(自然科学版)五年载文分析(1994～1998)

本文对《内蒙古工业大学学报》（自然科学版）１９９４～１９９８ 年五年载文情况进行了统计分析．其中包括收稿及刊用率,稿源,分类,内容,篇幅,出版时滞,作者情况以及各类基金论文发表情况等．将其统计结果与文献〔１〕进行了比较,结果表明刊用率,出版时滞和文章篇幅均较上一个五年有所下降．     

Multiple roots of estimating functions

Estimating functions can have multiple roots. In such cases, the statistician must choose among the roots to estimate the parameter. Standard asymptotic theory shows that in a wide variety of cases, there exists a unique consistent root, and that this root will lie asymptotically close to other consistent (possibly inefficient) estimators for the parameter. For this reason, attention has largely focused on the problem of selecting this root and determining its approximate asymptotic distribution. In this paper, however, we concentrate on the exact distribution of the roots as a random set. In particular, we propose the use of higher-order root intensity functions as a tool for examining the properties of the roots and determining their most problematic features. The use of root intensity functions of first and second order is illustrated by application to the score function for the Cauchy location model.     

主题标引状况分析及质量控制

主题标引是控制文献信息资源的重要技术手段。目前,主题标引中存在着标引不一致,过于简单,及选取的主题词专指性差,复合概念处理不当等问题,叙词语言和后控词表也有局限和不足。必须制定相应的主题标引的标准和依据,有控制的关键词标引方式值得推行。     

三十年来“核心期刊＂研究的文献计量分析及研究历程回顾

“核心期刊”问题是挑动中国大陆学界神经的敏感而沉重的话题。纵观三十年来核心期刊研究历程,研究该问题的论文呈现如下特点：论文的数量呈几何级数增长,被引频次绝对量呈现递增态势,研究内容从对核心期刊技术指标的研讨逐渐扩展到对其功能运用的探讨。当核心期刊功能泛化,从运用于单纯的选购图书,扩展到作为一种制度来评价期刊、评价学术水平、评价科研成果,进而将其作为期刊编辑水平评估和学术水平评价、科研成果评价的重要标准,甚至逐步演变成唯一的标准后,由于牵涉到利益问题,也就从学术问题逐步演变成公共问题、社会问题,核心期刊的负面效应就日益显现。由于办刊实力、办刊背景、办刊历史不同,期刊存在不同档次是一个不容讳言的客观事实。作为期刊从业者,特别是非核心期刊从业者,唯有抱着敬业务实的态度、冷静恬淡的心情对待这一现象（核心期刊概念本身就意味着期刊分级,意味着金字塔结构,处在塔尖的刊物只是少数,绝大多数刊物只能是塔基）。     

学术期刊与学术事业共生共存——15年办刊生涯感言

做任何事,只要真投入,肯努力,下功夫,就总会有收获;反之,则不仅成不了事,甚至还会出错。制定指标考量期刊．应着眼于考察编者、作者、读者这三个群体。如果主编和编辑的“学者化”与“职业化”发生矛盾,那么不应采取“割舍”一方的办法予以解决;这对矛盾的双方不是一方吃掉另一方的关系,而是相互促进的“互动”关系,是两者的“双赢”。学术、管理、市场是学术期刊生存发展必须依靠、应对、协调的“三重合力”,它们既像是“看得见的手”,又像是“看不见的手”。只要有学术事业就必定会有学术期刊：当前的紧迫问题是如何使期刊适应学术发展的需要,从而适应社会发展的要求;学术期刊不能沉沦于市场化的社会,应当挺立于高处,仗义执言,追求真理,主持正义。