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中文摘要：
本文在全球投入产出模型框架中首次提出测度产业部门位置的“广义增加值平均传递步长”新方法，并从强度和长度两个维度，全方位分析境外增加值贡献率一位置的关系，进而考察产业部门层面的“微笑曲线”是否存在。研究表明：本文的新方法提供了测度全球价值链位置的统一逻辑框架，几乎囊括了所有的其他位置测度方法。产业部门层面的“微笑曲线”不具有普遍意义，比如中国电子和光学仪器制造业略呈“微笑曲线”形状且逐步加深化，而中国纺织业却不存在。
英文摘要：
Based on the global input-output model, this paper firstly proposes a generalized framework for measuring industry position hy method of general ＂average propagation lengths＂ . From the perspective of participating strength and length of global value chains. this pat）er fully analyzes the relationship between value-added contribution rate of foreign industry to a domestic industry and the position, and tries to testify if there exists a smile curves. The results show that the new method of defining the concept of general value-added average propagation lengths provides a unified framework to measure the position of global value chain, including almost of all the other methods of measuring position of global value chain in the literature. The industry level ＂smile curve＂ does not have the universal significance. The electronic and optical instrument manufacturing industry of China is slightly a ＂＇smile curve＂ shape, but the smile curve of China textile industry does not exist.
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