“双循环”新发展格局下经济增长动力研究——基于TFP分解的视角

利用全球投入产出表数据,基于投入产出的优化模型计算全要素生产率(TFP)增长率,并将其分解为三种效应:技术进步效应、国内需求效应与贸易条件效应,以此考察新世纪以来的中国经济增长动力,为"双循环"新发展格局下的经济增长途径选择提供参考。研究发现:技术进步是中国TFP增长的主要动力,技术进步速率的下降是我国经济增长放缓的重要原因;2008年以后,技术进步效应对TFP增长的贡献在快速下降,而国内需求效应和贸易条件效应的支撑作用未能有效维持TFP增长率保持此前高位;对技术效应的产业结构分解可知,我国的比较优势在于制造业和仓储物流等行业,比较劣势在于产业链上游的原材料、基础材料制造等行业。反事实分析表明,保持人口增长是提振国内需求效应,促进TFP增长的重要动力。当前我国"双循环"新发展格局的实现瓶颈主要在于内外需求不足和技术进步速率下降,通过产业政策加强协同创新、短板创新,合理调整生育政策,可以切实推动"双循环"新发展格局下我国经济的高质量发展。     

The evolution of world trade from 1995 to 2014: A network approach

This paper employs network analysis to study world trade from 1995 to 2014. We focus on the main connective features of the world trade network (WTN) and their dynamics. Results suggest that countries’ efforts to attain the benefits of trade have resulted in an intertwined network that is increasingly dense, reciprocal, and clustered. However, these features do not correspond to a linear aggregation of the characteristics of its constituents (trade sectors). Trade linkages are distributed homogeneously among countries, but their intensity (i.e. their value) is highly concentrated in a small set of countries. The main connective features of the WTN were not affected by the 2007–2008 international financial crisis. However, we find that the crisis marks a turning point in the evolution of the WTN from a two-group (led by the US and Germany) to a three-group (led by the US, Germany, and China) hierarchical structure.     

基于异构数据库的企业产品质量控制模型设计

企业产品质量控制是一项复杂的系统工程,来自不同生产单元的数据具有较强的异构性,不利于质量控制系统的整合。基于XML的数据集成方案为解决这一问题提供了可能。文章探讨了基于XML的质量控制模型的架构,为产品质量控制提供了一个较好的平台。     

Competition and Appraisal Inflation

The Journal of Real Estate Finance and Economics - In mortgage debt contracts, real property serves as collateral and the terms of mortgage financing are largely conditional on the certification of...     

The role of R&D in high-technology trade: An empirical analysis

Conclusion This paper attempts to establish the relationship between the level of R&D activities of a country and its trade performance in high-technology products. Empirical evidence based on the limited data used in the paper shows that this relationship appears to be quite significant. An analysis of the implications of this relationship reveals that the low level of R&D in Canada is due to, among other factors, the prevalence of foreign ownership of Canadian manufacturing industries, and the resource-based characteristic of the Canadian economy. Given the nature of foreign-owned firms, the paper suggests that countries should not rely on them as a crucial instrument in the creation of an indigenous capacity to produce high-technology products which are competitive at the world level. Instead, domestic policies aimed at the development and nurturing of the countries' own scientific and technological skills are required. The views expressed in this paper are those of the author. They should not be construed as the official views of the Ministry of State for Science and Technology of the Government of Canada. Research assistance provided by Tom Wudwud and Penny Robinson is well appreciated. The author, however, is responsible for any omissions or errors that remain.