关键词: 数字经济, 产业数字化, 泰尔指数, 投入产出模型 

Abstract: With the continuous integration of digital technology and real economy, industrial digitization gradually injects new momentum for high-quality development. This paper firstly measures the digitization degree of different industries in China from 2001 to 2020 with the growth accounting framework, then investigates the industry differences and dynamic evolution of the digitization degree of various industries by using the Theil index and its decomposition method, and finally analyzes the economic linkages between different types of sectors based on the input-output model. The research shows that: 1) China?s industrial digitization develops faster than digital industrialization, and the indirect contribution of industrial digitization to economic growth is greater than the direct contribution of digital industrialization. 2) China?s industrial digitization has a good momentum of development and steady progress, but the digitization of agriculture, forestry, animal husbandry and fishery, real estate, mining, transportation, warehousing and postal industries is slow and much to be desired. 3) China?s industrial digitization degree presents the characteristic of “tertiary industry>secondary industry>primary industry”. Although the difference in digitization degree among the three industries gradually shrinks, the difference within the industry is still large, especially in the tertiary industry in which the degree of digitization is high. 4) The high integration industry of digital economy depends on the linkage effect to drive the output growth, while the low integration industry mainly depends on the endogenous development to drive the growth. It is urgent to speed up the pace of digital transformation and to realize industrial coordinated development.

Key words: Digital Economy, Industrial Digitization, Theil Index, Input-output Model