债务融资、债务结构与公司过度投资行为——来自我国上市公司的经验证据

文章以我国A股市场上市公司为研究对象,实证研究了债务融资对过度投资行为的抑制作用.研究发现:我国上市公司普遍存在着严重的过度投资现象,债务融资及其构成特征整体上并未对公司的过度投资行为起到抑制作用.通过进一步按最终控制人性质分组检验发现,债务融资比例与银行借款在国有控股公司不但没起到抑制过度投资行为的作用,反而还恶化了公司的过度投资行为,债务融资比例与银行借款在非国有控股公司中起到了制约过度投资的作用,商业信用和长短期债务在国有与非国有控股公司中仍没起到制约公司过度投资行为的作用.     

论政府的经济职能

政府的经济职能随经济社会发展而变化,不同时期不同经济体制下政府的经济职能不同,本文论述了政府经济职能的演变过程,分析了市场经济发达国家与我国政府经济职能的差异性,最后从理论上阐明了当前我国政府在经济发展、环境保护中应发挥的经济职能。     

全球服务业FDI变化的原因和影响

服务业FDI在FDI总量中的比重份额上升和变动幅度大,是近年来FDI变动的表现规律之一。服务业FDI具有地域限制、易受汇率风险影响、面临高的管理风险和波动性大的特征。影响服务业FDI的因素主要有收入增长、技术进步、金融发展以及投资和贸易政策变化。服务业FDI变动对经济活动的影响主要表现在带动FDI总量变动和影响产业结构调整两个方面。     

葬礼:面对死亡的社会安排 ———城市环境下葬礼仪式浅析

通过实地观察和对殡仪馆工作人员的访谈，描绘了天津市城市内部现有的国家规范框架下葬礼仪式的具体过程以及附着在这个框架下的民间习俗的现状，试图通过对国家规范框架下的“正式”葬礼仪式及与其相对的“非正式”仪式——家庭告别仪式的程序形式的简略描述，展现在城市中普通个人的葬礼基于公共环境和家庭环境不同场景所采用的不同仪式过程。这是民间习俗对规范仪式的补充，同时也是“正式”规范对这种“非正式”实践的通融和消化。在描述现状之外，作者试图讨论蕴含在葬礼仪式中，不同死亡个体的葬礼仪式形式、规模及参与者等方面的区分所展现出的一种社会对死亡个体生前所处社会结构地位的认同，这种认同不仅反映了仪式所处社会背景的秩序和结构，也强化了这个社会的秩序和价值判断标准。     

震荡与冲突：近代中国社会结构转型探析

中国传统社会结构乃是权威—依附模式。鸦片战争以后 ,随着家族中心主义的动摇、阶级的裂变和改组、社会群体的嬗变与激增以及沿海与内地、城市与乡村二元格局的出现 ,近代中国社会结构呈现出从宗法社会到二元结构社会转型的态势。     

Estimating household structure in ancient China by using historical data: a latent class analysis of partially missing patterns

Summary.  Social data often contain missing information. The problem is inevitably severe when analysing historical data. Conventionally, researchers analyse complete records only. Listwise deletion not only reduces the effective sample size but also may result in biased estimation, depending on the missingness mechanism. We analyse household types by using population registers from ancient China (618–907 AD) by comparing a simple classification, a latent class model of the complete data and a latent class model of the complete and partially missing data assuming four types of ignorable and non-ignorable missingness mechanisms. The findings show that either a frequency classification or a latent class analysis using the complete records only yielded biased estimates and incorrect conclusions in the presence of partially missing data of a non-ignorable mechanism. Although simply assuming ignorable or non-ignorable missing data produced consistently similarly higher estimates of the proportion of complex households, a specification of the relationship between the latent variable and the degree of missingness by a row effect uniform association model helped to capture the missingness mechanism better and improved the model fit.     

Bayesian networks for imputation

Summary.  Bayesian networks are particularly useful for dealing with high dimensional statistical problems. They allow a reduction in the complexity of the phenomenon under study by representing joint relationships between a set of variables through conditional relationships between subsets of these variables. Following Thibaudeau and Winkler we use Bayesian networks for imputing missing values. This method is introduced to deal with the problem of the consistency of imputed values: preservation of statistical relationships between variables ( statistical consistency ) and preservation of logical constraints in data ( logical consistency ). We perform some experiments on a subset of anonymous individual records from the 1991 UK population census.     

Consumption and Saving Behavior of Older and Younger Baby Boomers in Korea

The 1998 Korean Survey of Family Income and Expenditures was used to examine the overall consumption and saving behavior of Korean baby boomers and compared the differences in consumption and saving behavior between older and younger boomers. The t -test results indicated that the younger boomers allocated a significantly higher percentage of their expenditures on food away from home, household appliances, transportation and communication than did the older boomers, whereas the older boomers spent higher amounts and allocated larger budget shares on their children's education than did the younger boomers. The results of Ordinary Least-Squares (OLS) regression analysis showed that, holding other factors constant, older boomers not only spent significantly more in the total consumption expenditures and education expenditures, but older boomers also saved significantly less than did younger boomers.     

论作文教学的优化与学生创新能力的培养

为了有效地培养中小学生的创新能力 ,为他们的全面发展和终身发展奠定良好的基础 ,必须在作文教学的环境、过程、训练形式和评改方式等方面予以优化。其中 ,优化教学环境是前提 ,优化教学过程是关键 ,优化训练形式是重点 ,优化评改方式是保障。     

区域经济一体化对世界福利及多边贸易体制的影响

随着经济的全球化,在以GATT和WTO为代表的多边贸易自由化不断深化的同时,区域经济一体化组织层出不穷。而区域经济一体化对于世界福利和多边贸易是有利有弊的。因此,在政策制定上要扬长避短,既限制其不利的影响,同时又要积极发挥它的积极作用。