Abstract: In order to investigate the effects of retailer’s corporate social responsibility (CSR) on supply chain emission reduction decision-making and government subsidy efficiency, a three-stage Stackelberg game model involving government decision-makers is constructed. At firstly, in the precondition of consumer low-carbon preference and the implementation level of retailer’s CSR, the decentralized decision-making model is discussed. The analysis of the equilibrium results shows that: (1) the enhancement of the implementation level of retailer’s CSR results in the improvement of the emission reduction of manufacturers, the increment of manufacturer’s profit and social welfare, while the effects on retailer’s profit and the overall profit of the supply chain also depend on the coefficient of emission reduction efforts. (2) Government subsidy can increase the emission reduction of manufacturers and the profits of channel members. Further, retailers can improve the utilization efficiency of government unit subsidy through the intensive implementation of CSR, making the effect of government advancing the emission reduction and the profit more remarkable. By contrast, the retailer’s profit increment, promoting by government subsidy, is significant under the circumstance of the lower implementation level. Then comparing the optimal profit of the channel under the centralized and decentralized decision-making model, a two-part tariff and cost sharing contract is proposed, and it is proved that the contract can induce the supply chain coordination. Finally, on this basis, the research is extended to the situation of manufacturer implementing CSR and the new goals of the government. Through theoretical and numerical analysis, the impact of CSR behavior on supply chain emission reduction decision-making is discussed in detail to provide reference for the relevant decision-making of government and low-carbon supply chain.

Key words: low-carbon supply chain; government subsidies; corporate social responsibility; supply chain coordination