A quantile regression approach for estimating panel data models using instrumental variables

We introduce a quantile regression approach to panel data models with endogenous variables and individual effects correlated with the independent variables. We find newly developed quantile regression methods can be easily adapted to estimate this class of models efficiently.     

对中国信用卡消费群体特征的多元统计分析

本文在北京地区调查问卷的基础上设计了一套信用卡评价量表,通过多元统计中的因子分析、方差分析、卡方检验等手段分析信用卡评价变量与人口统计变量的相互关系,从量化的角度得出中国信用卡市场的基本现状和特点:信用卡各项服务的水平有很大的提升空间,开发潜力很大;信用卡的年费普遍过高;年轻群体相比于其他年龄群体对于信用卡的接受度、认同度、透支程度、及时还款程度都是最高的;信用卡的功能有待进一步开发;新功能的宣传所达到的效果较小;营销的细分市场应该主要通过透支额度和服务程度等来划分.最后文章还提出了相应的政策建议.     

The Impact of Omitting Promotion Variables on Simulation Experiments

Using store-level scanner data, elasticity matrices are estimated using a twotiered demand system. Two basic models are estimated, one with promotion variables and one without. Differences between the estimates across the two models are statistically significant. However, when the elasticities are used as 'inputs' into several simulation exercises, there are only small differences in merger effects and patent damage estimates.The results suggest that the differences are not 'economically' significant.     

情境满意度对旅游者购物行为的影响研究——以黄山市屯溪老街为例

情境是消费者行为学的重要研究对象,它通过影响消费者的感知进而影响消费者的购买决策。本文通过对黄山市屯溪老街旅游者的购物行为进行研究,分析不同满意类型的旅游者其购物行为偏好的差异,并在此基础上提出建议。     

An exploratory study of the impact of intervening variables on student performance in a Principles of Accounting course

The purpose of this paper is to provide some new empirical evidence on the determinants of student performance in a Principles of Accounting course at Birzeit University situated in the Occupied West Bank. It examines the impact of a number of new attitudinal variables on examination performance. The empirical results suggest that, in addition to a number of standard control variables, student perceptions of factors associated with class size, the attributes of the lecturer, student effort and the complexity of the course are associated with student performance in a first level principles of accounting course.     

基于4P营销变量的商业银行经营绩效研究

长期以来,有关商业银行经营绩效的研究一直是从经济学视角展开的,主要研究产权制度和治理结构对经营绩效的影响。如今,面对管理先进的国际大银行,我国商业银行该如何提高经营绩效更应从管理学的角度加以探讨。文章首先通过对中外商业银行经营绩效的比较分析,找出国内外银行绩效之间存在的差距;接着以4P营销变量(产品、价格、渠道、促销)为研究工具,以国内14家主要商业银行2000～2006年的财务指标面板数据(panel data)为研究样本,实证分析商业银行营销变量与经营绩效之间的关系。结果表明:商业银行营销变量对经营绩效有显著影响。但目前我国商业银行的产品创新能力依然不够;定价机制还不能满足利润最大化的要求;营销费用在不同产品之间的配置还不尽合理。文章最后对我国商业银行如何提高经营绩效提出了一些管理建议。     

制度质量对外资银行进入的影响——基于腐败控制维度的研究

腐败控制是制度质量提升的一个重要维度。金融业务的典型“契约密集”特征将强化腐败对外资银行进入的摩擦,而外资银行作为纯粹的市场“新进入者”也面临高昂的“有效腐败”成本,因此,腐败阻碍外资银行进入,通过腐败控制来提升制度质量将有利于银行业开放。本文基于中国分省主观认知数据,以县域人口规模与矿产资源丰裕度作为工具变量,识别了制度质量对外资银行进入的影响。文章表明,坚持以反腐倡廉作为提升制度质量的重要政策支点,将有利于推进银行业乃至整个金融业的对外开放进程。     

存在遗漏变量时的内生性研究

存在遗漏变量时回归系数的估计是计量经济学的一个重要内容。本文讨论单方程计量经济模型中随机解释变量的内生性,指出了目前的计量经济理论所存在的问题,提出了普通最小二乘估计一致性判别的新方法,并证明了存在遗漏变量情况下的普通最小二乘估计仍是一致估计。     

企业自主创新全面协同探讨

本文立足我国企业自主创新现状,结合文献研究,提出了企业自主创新主体、对象、时空、环境、效应各自内部及相互之间全面协同的命题,并探讨了企业自主创新全面协同的理论内涵、关联、特征、实现途径。突破了以往只是各子系统各自内部协同的格局, 使创新协同的范围大大扩展。     

Individual heterogeneity in the returns to schooling: instrumental variables quantile regression using twins data

Considerable effort has been exercised in estimating mean returns to education while carefully considering biases arising from unmeasured ability and measurement error. Recent work has investigated whether there are variations from the “mean” return to education across the population with mixed results. We use an instrumental variables estimator for quantile regression on a sample of twins to estimate an entire family of returns to education at different quantiles of the conditional distribution of wages while addressing simultaneity and measurement error biases. We test whether there is individual heterogeneity in returns to education and find that: more able individuals obtain more schooling perhaps due to lower marginal costs and/or higher marginal benefits of schooling and that higher ability individuals (those further to the right in the conditional distribution of wages) have higher returns to schooling consistent with a non-trivial interaction between schooling and unobserved abilities in the generation of earnings. The estimated returns are never lower than 9 percent and can be as high as 13 percent at the top of the conditional distribution of wages but they vary significantly only along the lower to middle quantiles. Our findings may have meaningful implications for the design of educational policies.