我国房地产泡沫与银行信贷规模的相关性研究

本文首先从理论上深刻剖析了房地产泡沫与银行信贷规模相互之间的作用与传导机制,在此基础上选取2006年-2018年相关指标的年度数据,对房地产泡沫与银行信贷规模进行了图形拟合与周期性波动规律分析,分析发现二者存在极高的契合度。建立房地产泡沫的函数,构建协整方程实证发现银行信贷规模对房地产泡沫的长期弹性系数为0.51,从长期来看银行信贷规模每增加1%,房地产泡沫也相应增加0.51%,进一步建立VAR模型实证发现房地产泡沫与银行信贷规模互为格兰杰因果关系,二者相互影响、相互促进。通过方差分解实证发现银行信贷规模对房地产泡沫的变动具有重要的影响,另一方面,房地产泡沫是影响银行信贷规模变动最主要的因素。     

陕西省城乡关联发展与基础设施建设动态关系分析

以陕西省为例,在对近20年城乡关联度和基础设施建设水平测度的基础上,利用格兰杰因果检验、脉冲响应函数及方差分解模型,对其城乡关联发展与基础设施建设的关系进行了计量分析。研究显示：①1990年以来,陕西省城乡关联度和基础设施建设水平经历了同步发展到拮抗的演变过程;②陕西省道路、邮电通信、环保和教育卫生设施建设水平变化与城乡关联度变化互为格兰杰因果关系,而城乡关联度变化仅是能源给水设施建设水平变化的单向格兰杰因果关系;③陕西省城乡关联度变化一直受到自身及道路、邮电通信、环保和教育卫生设施建设水平的影响,且后者的方差贡献逐渐增大,其中道路设施建设水平的方差贡献率在第5期（即1994年）超过了其自身的贡献率。     

Hub location problems in transportation networks

In this paper we propose a 4-index formulation for the uncapacitated multiple allocation hub location problem tailored for urban transport and liner shipping network design. This formulation is very tight and most of the tractable instances for MIP solvers are optimally solvable at the root node. While the existing state-of-the-art MIP solvers fail to solve even small size instances of problem, our accelerated and efficient primal (Benders) decomposition solves larger ones. In addition, a very efficient greedy heuristic, proven to be capable of obtaining high quality solutions, is proposed. We also introduce fixed cost values for Australian Post (AP) dataset.     

The impact of the introduction and use of an informational website on offline customer buying behavior

Do customers increase or decrease their spending in response to the introduction of an informational website? To answer this question, this study considers the effects of the introduction and use of an informational website by a large national retailer on offline customer buying behavior. More specifically, we study a website's effects on the number of shopping trips and the amount spent per category per shopping trip. The model is calibrated through the estimation of a Poisson model (shopping trips) and a type-II tobit model (the amount spent per category per shopping trip), with effect parameters that vary across customers. For the focal retailer, an informational website creates more bad than good news; most website visitors engage in fewer shopping trips and spend less in all product categories. The authors also compare the characteristics of shoppers who exhibit negative website effects with those few shoppers who show positive effects and thus derive key implications for research and practice.     

基于VAR模型的深圳保险发展与宏观经济增长关联机制研究

深圳特区建立30年以来,随着宏观经济的迅猛发展,深圳保险业也不断发展壮大,创造了诸多全国第一。本文通过建立VAR模型,借助脉冲响应函数、方差分解方法,揭示了深圳保险发展与宏观经济之间的关联机制,分析了金融危机对深圳保险业的影响路径,并在此基础上形成了一些结论和建议。     

我国个人所得税再分配效应及累进性的实证分析

税收是调节收入分配差距的有效手段之一。本文循着层层递进的逻辑,建立了税收再分配效应及累进性分解的数学理论模型,实证分析了1995年到2008年间我国个人所得税的再分配效应,剖析了影响其变动的深层次原因。结果表明:除2006年外,我国个人所得税起到了正向、且进一步加强的再分配效应,但调节效果非常有限;平均税率明显偏低,累进性基本呈下降趋势;分类征收模式导致总体累进性下降,工资薪金所得税是个人所得税累进性的主要来源;免征额在工资薪金所得税的累进性中起主导作用,其次是税率结构,而社会保障支出起较小的累进(或累退)效果。因此,在公平视角下改革与完善我国个人所得税制迫在眉睫。     

城市化与能源消费关系的动态计量分析——以陕西省电力消费为例

运用经济计量方法,实证了陕西省城市化与能源消费之间的动态相关性,并利用因素分解模型定量测算出陕西城市化对能源消费变动的贡献份额.结果表明,陕西省城市化与能源消费量之间存在协整关系.但这种长期均衡的短期调整幅度不大;现阶段城市化对陕西能源需求的贡献作用尚比较小.且呈现逐年下降的趋势.因此,能源需求不会成为制约陕西省城市化进程中的瓶颈.     

宏观经济运行质量评价指标的选择方法

筛选指标的传统方法或者是定性分析或者是单一的定量分析。本文收集了37个反映宏观经济运行质量的指标信息,依据相关系数及其聚类分析,将相关程度不同的指标聚为不同的组或类,然后在相关系数高度相关的指标组进行因果关系分析,选取那些作为原因的变量或指标。利用相关时间序列建模方法中的向量自回归模型,及其脉冲响应函数和方差分解分析,进一步区分那些影响其他变量的重要变量。最后得到一组既能反映现象变化,又是主要或重要变量的14个指标。这一指标筛选方法不同于传统方法,它充分利用了指标之间的关联信息、因果信息和动态相依信息,具有综合性与实用性。     

Decomposition of energy-related CO2 emission over 1991-2006 in China

This paper presents a decomposition analysis of energy-related CO₂ emission in China for the period 1991-2006 divided into three equal time intervals. The complete decomposition method developed by Sun is used to analyze the nature of the four factors: CO₂ intensity, energy intensity, structural changes and economic activity. The results show that economic activity has the largest positive effect in CO₂ emission changes in all the major economic sectors and China has achieved a considerable decrease in CO₂ emission mainly due to the improved energy intensity. However, the impact of CO₂ intensity and structural changes is relatively small. Structural changes only exhibit positive effect to the CO₂ mitigation in agricultural sector, and CO₂ intensity also contributes to the decrease of CO₂ emission in transportation sector. Moreover, a formula about CO₂ mitigation is presented in this paper, which shows that China has made a significant contribution to reducing global CO₂ emission.     

持久收入假说与我国城镇居民消费——基于省级面板数据的实证分析

运用基于持久收入和暂时收入的两种分解方法的省际面板模型检验持久收入假说的三个假设.结果发现,我国城镇居民消费与持久收入和暂时收入均存在显著的相关关系,暂时收入的边际消费倾向不为零;就诸省份而言,暂时收入的边际消费倾向不同.进一步探讨了持久收入假说不能完全解释我国城镇居民消费行为的原因."λ假说"检验表明,城镇居民消费对当期收入过度敏感,其呈现理性化趋势.