关键词: 竞争供应链, 碳减排成本, 消费者低碳偏好, 供应链契约, 协调

Abstract: To discuss the contracting decisions for low-and high-carbon supply chains competitively in the market,by taking a decentralized competitive supply chain composed of a high-carbon supply chain (supply chain 1) and a low-carbon supply chain (supply chain 2) as the research object (each supply chain consisted of one manufacturer and one retailer),according to the members of supply chain,the wholesale price contract (W) and two-part tariffs(T) were adopted to construct the players' profit models under four scenarios: both of two supply chains took W,both of two supply chains took T,the supply chain 1 took W and the supply chain 2 took T,the supply chain 1 took T and the supply chain 2 took W.The corresponding wholesale price,retail price and the expected profit of supply chain members were calculated,besides the balance contracting strategy for supply chain was discussed.The study showed that when the fixed cost was adjusted within a certain range,two supply chain equilibrium strategies used W for the high carbon supply chain and T for the low carbon supply chain;otherwise the equilibrium decision all used W for two supply chains.Owing to the competition factors,high-carbon supply chain could not coordinate supply chains through two-part tariffs,while low-carbon supply chain could achieve Pareto improvement through adjustment of fixed costs,and the option of implementation for Pareto improvement would become easier as the level of carbon emission decreased.

Key words: competitive supply chain, carbon-reduction cost, low-carbon preference, supply chain contract, coordination