School of International Trade and Economics, Shandong University of Finance and Economics, Jinan 250014, China.
Int J Environ Res Public Health. 2022 Oct 7;19(19):12855. doi: 10.3390/ijerph191912855.
Facing the increasingly deteriorating climate, carbon emission reduction has become a global consensus. In particular, as an industry with very serious pollution emissions, the manufacturing industry is under enormous pressure to reduce environmental consumption. At the same time, against the background of rapid digitization development, the production and organization of the manufacturing industry have greatly changed, which also provides new research ideas for global carbon emission reduction. Based on the panel data of 40 major economies in the world, this paper calculates the degree of input digitization of the manufacturing industry using the input-output method and constructs a triple fixed effect model to analyze the impact of manufacturing's input digitization on its carbon emission intensity from the perspective of the world and developing countries. The research finds that, first, on the global level, input digitization significantly reduces the carbon emission intensity of manufacturing, and the effect of carbon reduction increases gradually over time, with a noticeable industry spillover effect. Second, the test results from developing countries show that the relationship between digital input from developed countries and manufacturing's carbon intensity in developing countries presents an inverted U shape. Third, heterogeneity analysis shows that digital input has the most obvious effect on carbon reduction in the pollution-intensive manufacturing sector. Tracking the sources of digital input, it is found that digital input from high-tech economies has the most obvious effect on carbon reduction. The paper takes the lead in clarifying the impact of digitization on carbon emissions from the manufacturing sector, expands the existing research on the digital economy and the environment, and also makes a theoretical contribution to global carbon emission reduction.
面对日益恶化的气候，减少碳排放已成为全球共识。特别是制造业作为污染排放非常严重的行业，面临着巨大的减排环境消耗的压力。同时，在数字化快速发展的背景下，制造业的生产和组织发生了重大变化，这也为全球碳减排提供了新的研究思路。本文基于世界 40 个主要经济体的面板数据，运用投入产出法计算制造业投入数字化程度，并构建三重固定效应模型，从全球和发展中国家两个视角分析制造业投入数字化对其碳强度的影响。研究发现：第一，在全球层面上，投入数字化显著降低了制造业的碳排放强度，且减排效应随时间逐渐增强，具有明显的行业溢出效应；第二，发展中国家的实证检验结果表明，发达国家数字投入与发展中国家制造业碳强度之间呈现倒 U 型关系；第三，异质性分析表明，数字投入对污染密集型制造业的减排效果最为明显。追溯数字投入的来源，发现高技能经济的数字投入对碳减排的效果最为显著。本文率先从制造业角度厘清了数字化对碳排放的影响，拓展了数字经济与环境的现有研究，也为全球碳减排做出了理论贡献。
