我国城市化成本关系的实证分析

对城市化私人成本、公共成本及城市化率进行了因果关系检验,发现其关系为:私人成本支出是城市化率提高的直接动因,而城市化率提高又引起公共成本的支出增加。若政府公共成本支出不足,不会降低城市化的速度,将导致城市公共资源紧张,引起若干社会问题。     

我国环境民事公益诉讼的证明标准探析

《中华人民共和国民事诉讼法》第55条规定了民事公益诉讼,其中它以环境民事公益诉讼为典型类型,但是此条款过于原则化、系统化．本文在分析环境公益民事诉讼特殊性的基础上,探析了我国环境民事公益诉讼证明标准适用的特殊规则．     

外商直接投资与区域经济增长的关系研究——基于广西数据的实证检验

以广西1990年~2007年样本区间的统计数据为基础,利用协整检验与格兰杰因果检验方法．建立回归模型对外商直接投资与广西经济增长之间的关系进行实证研究。研究结果表明,在样本区间内,广西经济增长不是外商直接投资的格兰杰原因,外商直接投资是广西经济增长的格兰杰原因,但外商直接投资对广西经济增长的促进效果不明显。     

股票收益和交易量因果关系检验

通过对中国深圳A股市场上的股票交易量和股票收益及收益变动性之间的因果关系实证分析，发现交易量和价格绝对量的变化之间以及交易量和股票收益之间均至正相关，而收益变动性和交易量之间呈负相关。另外，不论是股票的交易量、股票收益以及股票收益的变动性都呈现序列平稳性，而股票价格则至现出非平稳性。股票交易量和股票收益之间存在双向因果关系，收益的变动性和交易量之间不存在Granger因果关系。     

票据无因性的有限性

人们往往在强调票据是无因证券时，忽视了票据的无因性是有限制的，本文通过一个案例的剖析，说明了票据的无因性会受票据基础关系违反法律，行政法规规定的限制；在票据法没有规定时，适用其他及行政法规。     

The impact of relational markers on expository text comprehension in L1 and L2

This article reports on an experimentinvestigating the impact of causal discoursemarkers (connectives and signaling phrases) onthe comprehension of expository texts in L1 andL2. Although several psycholinguistic studieshave investigated the impact of connectives andlexical markers of text structure oncomprehension (i.e. off-line), there is noconsensus on the exact effect of explicitdiscourse markers on text understanding; threedifferent findings are reported in theliterature: markers would have a facilitatingeffect, an interfering effect or no effect atall. The first goal of this article is toclarify this problem of contradicting resultsby limiting the scope of the study to causalrelations, and to one specific text type:expository texts. Furthermore, the naturalnessof the experimental texts was controlled,readers did not need specific backgroundknowledge to understand the texts and theexperimental method consisted of open answerquestioning. Our second goal is to investigateto what extent a supposed effect of linguisticmarking depends on readers proficiency in afirst or second language.The experiment consisted in the reading of short expository texts in two languages, Dutchand French, which both functioned as L1 and L2.The results indicate that readers benefit fromthe presence of causal relational markers bothin L1 and in L2. Implications for (theoriesof) text processing are discussed, as well asfor the further insights in readingcomprehension in L1 and L2.     

Practitioner tales: possible roles for research evidence in practice

ABSTRACT

This paper discusses, compares, and contrasts 4 different models for bringing evidence from randomised controlled trials (RCTs) into practice and into practical reasoning. I look at what questions the models can and cannot answer, what role they accord to RCT evidence, and what their possible attraction for practitioners might be. The models are those of Philip Davies, Nancy Cartwright, Stephen Toulmin, and Harald Grimen. The first 2 are constructed for the purpose of using evidence in practice, the 3rd is an adapted argumentation model, and the 4th is based on phronesis and represents an alternative to evidence-based education. It is argued that of these, Toulmin’s model has the narrative qualities that make it the most usable and practitioner-friendly model.     

中国生产性服务业与制造业间关系研究——基于1978~2007年中国数据的协整分析与格兰杰因果检验

服务经奔时代的到来,生产性服务业对经济发展推动作用的凸现引起了越来越多人的关注。然而,从已有的研究采看,生产性服务业与制造业的关系问题并未得到确定的答案,在中国情境下对该问题进行实证研究的文献更显单薄。为此,本文从生产性服务业与制造业的关系角度出发．应用协整分析和格兰杰检验．发现我国的生产性服务业与制造业之间存在长期均衡关系,而且二者之间互为因果荚系。同时,生产性服务业所包含的交通运输仓储和邮政业、房地产业与制造业之间也具有长期均衡关系并互为因果关系。     

Cross-sectional research: A critical perspective,use cases,and recommendations for IS research

Cross-sectional data is pervasive in information systems (IS) research. This editorial reviews cross-sectional studies, summarizes their strengths and limitations, and derives use cases of when cross-sectional data is and is not useful in answering research questions. We raise concerns about assertions of temporal causality using data collected employing cross-sectional methods with no temporal order, which makes cause and effect difficult to establish. Based on our discussion of research using cross-sectional data and its limitations, we offer four recommendations for when and how to use such data: (1) improve credibility by reporting research in detail and transparently, (2) ensure appropriate sampling, (3) take configurational perspectives, and (4) integrate cross-sectional data into mixed- or multi-method designs. By doing so, we help IS researchers position and use cross-sectional studies appropriately within their methodological repertoire.     

农业科技人力资源与农业经济发展关系分析

基于对我国种植业科研机构及其科技人力资源情况的深入分析,研究运用协整检验和Granger因果检验等方法,探讨了种植业科研机构科技人员结构、人力资本、科技人员流动与农业经济发展的关系,主要得出以下结论：第一,种植业科研机构科技人员结构、人力资本、科技人员流动与农业经济发展均为一阶单整序列。第二,农业经济发展序列与科技人力资源序列存在长期均衡和短期动态关系,当短期动态关系偏离时,将以90.18%的力度调整至均衡状态。第三,女性科技人员比重与人力资本的增加均对农业经济发展具有正面影响,科技人员流动对农业经济发展影响不明显,甚至具有微负面效应。第四,种植业科研机构科技人员结构与农业经济发展,农业经济发展与科技人员流入、人力资本均存在单向因果关系;农业经济发展与科技人员流出之间因果关系得不到实证支持。据此,研究提出了充分发挥科技人力资源优势,促进农业经济发展的建议。