关键词: 碳限额, 减排技术, 寡头竞争企业, 定价决策, 碳排量

Abstract: To research the influence of carbon cap policy on pricing and carbon emission decisions of two duopoly-competition enterprises (high carbon enterprise and low carbon enterprise),the production decision which made competition enterprises profit maximize and the carbon cap policy which made government obtain economy and environment double optimum were analyzed.The result showed that The proper carbon cap policy constraint could improve two duopoly-competition enterprises' profit by comparing with no policy constraint,and an optimal carbon cap value which could make enterprises obtain Pareto improvement on earning and carbon emission was existed.The pricing of high-carbon enterprise kept constant and then decreased with the increase of carbon cap.The pricing of low-carbon enterprises decreased and then increased with the increase of carbon cap when the carbon emissions of high-carbon enterprises are greater than that of low-carbon enterprises.Otherwise,the pricing of low-carbon enterprises decreased as the carbon cap increased,and the government did not implement the carbon cap policy would be conducive to the promotion and implementation of carbon emission reduction technology.

Key words: carbon cap, carbon reduction technology, duopoly-competition enterprises, pricing decision, carbon emissions