关键词: 低碳供应链, 政府补贴, 碳税, 博弈论

Abstract: In order to promote the development of low-carbon economy, the government has adopted subsidies and carbon tax policies. Although the two government's policies have the same objectives, their mechanisms are different. Thus, the game model between a low-carbon enterprise and an ordinary enterprise is constructed based on the two production models (One production model is that the low-carbon enterprises only produce low-carbon products, and the other production model is that the low-carbon enterprises produce two products at the same time.) in order to comparatively analyze the impact of government subsidies and carbon tax policies on the development of low-carbon economy. The main research results are as follows: (1) When two products are produced by the low-carbon enterprises at the same time, government subsidies could reduce the unit low-carbon products sales price, reduce the sales of ordinary products and environmental impact, and increase the low-carbon products sales and the overall income of low-carbon supply chains, but government subsidies do not affect the unit ordinary sale price; (2) When low-carbon enterprises only produce low-carbon products, the government carbon tax could increase the unit two product sales price, which could increase consumer purchase costs and reduce the enthusiasm of consumers to purchase low-carbon products; (3) When the impact ratio of products to the environment is more than 0.5,the government subsidy strategy has the biggest impact on the environment.

Key words: low-carbon supply chain, government subsidies, carbon tax, game theory