Looking for homogeneous groups of respondents and nonrespondents using latent class analysis

Concerns about decreasing response rates have led to many nonresponse studies. Unfortunately, usually only a limited amount of data is available on nonrespondents. Linking administrative data makes information available on all the sampled units including nonrespondents. Statistics Netherlands has constructed a database in which several administrative records and several surveys are connected. In this explorative study we use this dataset to look for homogenous groups of respondents and nonrespondents in survey research using latent class cluster analysis. Latent class techniques can provide insight into the problem of selective nonresponse and currently under-represented societal groups. We identify four different latent classes in a recent Dutch survey and replicate the findings for the same survey conducted 4 years later. Two of the types of sampled units have above-average response rates and the other two have below-average response rates. We also evaluate various latent class models with other response outcomes to gain insight into the contact and cooperation process.     

The source of Black-White inequality in early language acquisition: Evidence from Early Head Start

I compare language learning trajectories for Black and White children over the first 3 years of life using data from the Early Head Start Research and Evaluation study (EHSRE) in order to determine the timing and source of divergence in early language skill. Results indicate that that while controlling for racial differences in family background and a measure of the home language environment cannot entirely account for disparities in language acquisition, interactions between age, race and maternal education, and between race and a time-varying measure of the home language environment play a significant role. I show that returns to parental education and the home language environment, in terms of language learning, are higher for White children than their Black peers. Specification checks confirm that these results are robust to alternate definitions of child language and the home language environment, and that no interactions between race, age and any of the other covariates are significant. I discuss possible explanations for these race specific education gradients, including measurement error and test bias. In addition, I address relevant empirical issues in estimating language growth with respect to linguistic inputs and the home language environment.     

“史学二陈”及其学术精神

陈垣和陈寅恪合称“史学二陈”.这一称谓产生于1950年代初.而“二陈”现象形成于20世纪二三十年代.“二陈”在学术上均重视目录学、年代学,善以文字学治史,均在宗教史、蒙元史、明清史方面有重要建树,不仅在史学研究方面有诸多相同点,又相互交流,商榷学术,彼此影响.晚年在政治思想上虽有异趣,但在学术上追求“实事求是”的目标是一致的,殊途同归.“史学二陈”是20世纪中国学术史上最具魅力的现象之一,宜用学术眼光解读这一现象.     

物流专业英语的学习需求分析及启示

需求分析是一种评估研究范畴,可以为改进物流专业英语教学提供依据。本研究中需求分析的抽样调查结果显示,物流专业英语教学中学习者非常关注和强调专业英语的实用性和应用性,而这恰恰是当前物流专业英语教学的"短板"。由此得出改进"语言输入"、重视"语言输出"、优化"评估手段"等改进物流专业英语教学的思路和启示。     

语言接触的诸因素分析——以新疆民汉语言接触为例

文章依托语言接触理论,以新疆民汉语言接触为例,从语内和语外因素入手,全面分析了诸多因素对语言接触的影响。语外音素包括政治目标、经贸往来、文化交流、移民杂居、战争征服。语内因素认为,语言是社会发展的产物,是开放调适的体系,是文化发展的赁藉,是动态发展的机制,是扩张竞争的主导,是共同区域的要素,是接触融洽的必然。     

对外开放度与经济增长的实证研究——基于河北省数据的协整分析

本文运用协整检验、误差修正模型和格兰杰检验对河北省对外开放程度与经济增长之间的关系进行了实证研究。结果表明,长期来看,河北省经济增长与对外开放度存在长期稳定的协整关系,短期内对外开放对河北省经济增长的影响较小。对外开放和实际GDP增长之间具有互相的因果关系,但对外开放对经济增长的影响大于经济增长对对外开放的影响。     

文学信息传播视角下的语言文化变异研究

在我国社会经济发展的过程中,文学信息传播中语言文化的变异研究,其核心在于强调信息传播的过程中,除了注重翻译人员语言中体现的语言文化价值外,还要注重文化翻译人员的文化背景以及其翻译过程中体现的文学信息及实质感悟,并以此来掌握翻译人员在信息传播中所发挥的媒介作用。由此不难看出,文学信息在传播的过程中,针对不同地区、不同民族之间,有着促进文化交流的作用。基于相关因素的影响,文学信息在传播的过程中会发生一定的变化。在此,本文针对文学信息传播视角下的语言文化变异,做以下论述。     

第三方物流外包服务综合绩效评估模型的构建

本文根据全面性、特殊性、可比性、可操作性原则,参考评价第三方物流企业的一般评价指标的选取原则,选取了包括运力资源利用率、固定资产周转率、订单完成率、配送资源利用率等20个具有代表性的指标,详细地构建了第三方企业物流系统综合评价指标体系,并采用主成分因子分析法对企业物流系统进行了综合评价。     

公司运营危机预警模型的比较研究——以中国上市公司为例

研究当前国内外公司运营危机预警问题的现状,首先要寻找一套适合于我国上市公司的财务状况识别指标体系,然后依据该指标体系采用不同方法建立运营危机预警模型,最后利用样本公司实际指标数据对各个模型的短期及中期预警效果进行比较分析与实证研究。结果表明,分类树模型的三年期预警准确率都在80%以上。