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Empirical Analysis of Xinjiang's Bilateral Trade: Gravity Model Approach 被引量:2
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作者 CHEN Xuegang YANG Zhaoping LIU Xuling 《Chinese Geographical Science》 SCIE CSCD 2008年第1期9-16,共8页
Based on the basic trade gravity model and Xinjiang's practical situation, new explanatory variables (GDP, GDPpc and SCO) are introduced to build an extended trade gravity model fitting for Xinjiang's bilatera... Based on the basic trade gravity model and Xinjiang's practical situation, new explanatory variables (GDP, GDPpc and SCO) are introduced to build an extended trade gravity model fitting for Xinjiang's bilateral trade. From the empirical analysis of this model, it is proposed that those three variables affect the Xinjiang's bilateral trade posi- tively. Whereas, geographic distance is found to be a significant factor influencing Xinjiang’s bilateral trade negatively. Then, by the extended trade gravity model, this article analyzes the present trade situation between Xinjiang and its main trade partners quantitatively in 2004. The results indicate that Xinjiang cooperates with its most trade partners successfully in terms of present economic scale and developing level. Xinjiang has established successfully trade part- nership with Central Asia, Central Europe and Eastern Europe, Western Europe, East Asia and South Asia. However, the foreign trade development with West Asia is much slower. Finally, some suggestions on developing Xinjiang's for- eign trade are put forward. 展开更多
关键词 trade gravity model extended trade gravity model bilateral trade Shanghai Cooperation Organization (SCO) XINJIANG
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美国太空战略转型及其影响 被引量:8
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作者 罗绍琴 张伟 《美国研究》 CSSCI 北大核心 2021年第3期60-80,6,7,共23页
自20世纪50年代以来,美国太空战略不断调整,先后实现了两次重大转型。美国太空战略的理念经历了从"新边疆"到"高边疆"再到"最后的边疆"两次转变,战略目标中的领导地位内涵经历了从"技术优势地位&qu... 自20世纪50年代以来,美国太空战略不断调整,先后实现了两次重大转型。美国太空战略的理念经历了从"新边疆"到"高边疆"再到"最后的边疆"两次转变,战略目标中的领导地位内涵经历了从"技术优势地位"到"效用与防御优势"再到当前"产业、规则与军事"复合推进的演化,战略资源与战略手段也呈现出多元化发展趋势。美国战略转型由美国的逐霸本性、太空技术发展的自身规律、太空民主化转型以及美国对其能力与威胁的评估四种动力协同推动而成。美国太空战略转型将对中国参与太空国际规范完善与太空治理带来更多的不确定性。 展开更多
关键词 美国军事与外交 太空战略 “新边疆” “高边疆” “最后的边疆” 特朗普政府 奥巴马政府
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