关键词: 碳交易, 竞争, 信息非对称, 联合契约, 供应链协调

Abstract: In this paper, under the carbon trading mechanism, considering that there is competition among manufacturers and the cost coefficient of emission reduction is the private information of low-carbon manufacturer, supply chain models under the condition of information symmetry and asymmetry are constructed respectively to make decisions on emission reduction rate and product sales price of low-carbon manufacturer. By introducing a joint contract which consists of wholesale price and cost sharing, the low-carbon manufacturer is encouraged to transfer the real information of emission reduction cost, sensitivity analysis of carbon trading price and emission reduction cost coefficient is carried out through calculation examples. The results show that the introduction of joint contract can make the profit of supply chain under asymmetric information reach the level of centralized decision. The increase in carbon trading price will encourage manufacturers to reduce emissions actively, reduce total carbon emissions and improve the profits of supply chain. The lowering of emission reduction cost coefficient of low-carbon manufacturer is conducive to reducing carbon emissions, increasing product market demand and realizing profit growth of supply chain.

Key words: carbon trading, competition, asymmetry information, joint contract, coordination of supply chain