Cointegration in China's log import demand: Price endogeneity and structural change

The monthly data of China's log import from January 2000 to December 2013 are used to estimate the import demand elasticities, with the consideration of possible price endogeneity due to China's large share of the international log market, and structural break caused by global financial crisis in 2008. To address the possible structural break, cointegration tests allowing for a deterministic shift in the level of the variables are employed, and a two-stage estimation with top-down sequential elimination algorithm is performed on the restricted subset VECM. The results demonstrate that there exists a long-run cointegration relationship between China's log import and the explanatory variables. The import elasticities of macroeconomic development and import price are around 0.76 and −0.81, respectively. Other things being equal, the structural break would induce a 29.6% decline in China's log import. All the above parameters are significant at the 1% risk level. Furthermore, the contribution decomposition analysis suggests that China's macroeconomic development plays a dominant role in determining its log import, which implies that China's log import would not increase as quickly as before, given that its economy is shifting into the “New Normal State”. This conjecture is supported by our simulations, which indicate that, by 2020, the growth rate of China's log import will be lower than it has been in the past and the import volume would be approximately 1.1–1.6 times greater compared to imports in 2013.     

A Qualitative Study for Measuring Warehouse Performance Using Triangulation Approach

This research aims to validate a structural equation modeling （SEM） model for measuring warehouse performance using data from an international company in Australia （company G）. Moreover, a methodological triangulation method was also adopted to test whether different methodological approaches produce convergent findings about warehouse performance measurement （WPM）. These three different methods are the SEM model, the multiple case research study, and validation of the SEM model using data from 80 companies in Thailand and a company in Australia. With the results from the triangulation method, it is obvious that the SEM model can be used to measure the performance of warehouses in Thailand and Australia. Since the SEM model consists only of significant indicators, it is more appropriate than company G＇s scorecard. Furthermore, the SEM model can overcome the limitations of traditional models by allowing companies to compare their performance over time.     

When was the U.S. housing downturn predictable? A comparison of univariate forecasting methods

This paper uses three classes of univariate time series techniques (ARIMA type models, switching regression models, and state-space/structural time series models) to forecast, on an ex post basis, the downturn in U.S. housing prices starting around 2006. The performance of the techniques is compared within each class and across classes by out-of-sample forecasts for a number of different forecast points prior to and during the downturn. Most forecasting models are able to predict a downturn in future home prices by mid 2006. Some state-space models can predict an impending downturn as early as June 2005. State-space/structural time series models tend to produce the most accurate forecasts, although they are not necessarily the models with the best in-sample fit.     

Structural reforms and fiscal adjustments: policy options for the euro area

This paper analyses the effects of structural reform and fiscal consolidation policies in the Euro Area using a stylized new-Keynesian model. A number of issues are focused upon: (i) the modelling and effects of fiscal consolidation and structural reforms, and (ii) evaluation of alternative reform and consolidation scenarios, including their joint implementation.     

新型外包型钢与粘钢综合加固法

由于业主对建筑结构使用功能的需求,往往在剪力墙开设新的洞口,开洞后将大大降低剪力墙的抗剪能力,对于新建工程可以对剪力墙洞口部位进行增加暗柱、暗梁或加强钢筋来补强剪力墙的抗剪能力。而对于剪力墙开洞改造工程来说,开洞后因无法增加暗梁、暗柱对剪力墙提高承载能力。因此,在开洞后就必须进行加固,现就对传统的加固方法进行分析,并根据实际施工情况提出新的方法。     

港口物流机械风载荷计算方法研究

风载荷的研究在港口物流机械的设计和计算中占据着重要的地位,主要是因为它对起重机结构强度和稳定性的影响极其重要。而风载荷的确定通常由风力系数、挡风折减系数、有效迎风面积以及相应条件下的风压确定。     

论税收政策及其政策目标与政策手段的选择

税收政策是政府社会经济政策的重要组成部分 ,税收政策的运用 ,主要取决于税收政策目标和税收政策手段的选择。从税收政策、税收政策目标及其税收政策手段的内涵及抉择条件入手 ,对现阶段我国税收政策目标的确定、税收政策手段的选择路径提出若干建议     

“以医促养”还是“以养促养 ”:医疗保险与养老金的健康绩效比较

CLHLS2014年数据的结构方程模型估计结果显示,养老金收入能显著提高老年人的主观健康,并且主观健康还能显著增进生理健康。路径模型进一步检验发现养老金能通过显著改善受访者的居住条件、水果摄入量、及时就医、经济状况等途径来提高老年人的生理健康。而医疗保险支出与老年人主观健康、生理健康之间都呈显著负相关关系。相比医疗保险支出,养老金能带来更正面更积极的健康绩效,且促进老年人健康的途径更为丰富。实证结果说明,相比“以医促养”,“以养促养”的老年人健康绩效更优。本文建议我国从以疾病治疗为中心转为依托养老金购买养老服务,提高老年人生活质量的健康保障体系。     

碳排放约束视角下产业智能化对区域经济差距的影响研究

本文利用2003~2019年中国省级面板数据,从碳排放约束视角出发,实证考察了产业智能化对区域经济差距影响的差异性和产业智能化影响区域经济差距的机制。研究表明,产业智能化对缩小全国、东、中和西部地区省域间经济差距具有显著的正向效应;进一步考虑碳排放约束,发现碳排放约束正向调节了产业智能化对区域经济差距的正向效应,西部地区由于自身产业结构和区位因素,抑制了产业智能化对区域经济差距的正向效应;最后,对产业结构升级的两个子维度在产业智能化和区域经济差距间的中介效应检验,发现产业结构升级的中介效应存在,且主要是通过产业结构高级化实现,产业结构合理化发挥的作用较小。     

供需结构优化、分配结构演化与2035年共同富裕目标展望

共同富裕是社会主义的本质要求,中国推动经济社会发展,归根结底是要实现全体人民共同富裕。新发展阶段下中国既要优化供需结构以加快构建新发展格局,又要改善分配结构以全面贯彻新发展理念,而供需结构优化与分配结构演化又是紧密关联的。本文建立了一个包含供给结构、需求结构和分配结构的多部门动态一般均衡模型,将分配结构演化分解到供给结构与需求结构转型上,提出了需求结构通过影响供给结构进而影响分配结构的理论机制。本文对近三十年全球四十余个经济体劳动收入份额和技能溢价的演化进行了发展核算,展示了中国分配结构演化的特征事实、供需动因与国际比较。研究发现,中国分配结构演化道路具有一定的特殊性:一方面,劳动收入份额转为上升,供给侧(需求侧)最主要的推动力是持续提高的劳动密集型产业(消费品)的劳动密集程度;另一方面,技能溢价不断扩大,供给侧(需求侧)最主要的推动力是持续提高的产业内部(消费品)的技能密集程度;供需结构转型在其中也发挥了重要作用。本文还基于历史趋势定量预测了未来中国分配结构的演化趋势,为实现2035年共同富裕目标提供了现实依据与政策参考。