关键词: 全球数字价值链, 生产分解模型, 结构分解

Abstract: This paper presents an international input-output model with supporting sectors of digital trade to estimate the value added of global digital value chains. The proposed method incorporates digital division of labor, traditional division of labor, and integrated division of labor into a unified production decomposition model to directly account the value added. The study finds that the value added of the global digital value chain shows a stable upward trend, and its share in the GVC increases significantly. The division of labor has a typical aggregation effect and ladder distribution, countries such as China, the U.S. and Germany have stronger profitability in the global digital value chain. The high-tech manufacturing is the sector with the highest concentration of value added. Changes in final demand are important factors driving the evolution of value added, but with large differences in terms of industrial impact. Global digital value chains have buffered the impact of Covid-19 on the global division of labor system to a certain extent as a stabilizer of the system adjustment. This research provides an important reference for analyzing the allocation of the added value in digital GVC and analyzing the trend of the new pattern of global division of labor in the digital economy.

Key words: Global Digital Value Chain, Production Decomposition Model, Structural Decomposition