Decision-making Study on Sulfur Reduction in Port and Shipping Service Supply Chain Considering Shore Power Subsidy

In the context of government subsidies for shore-side power technology, we focus on the port and shipping supply chain. We develop a game model of emission reductions under centralised and decentralised decisions, and introduce a supply chain coordination contract as a response to the double marginal effect problem in decentralised decisions. Finally, we use numerical simulations to study the effects of government subsidies and supply chain contracts on decisions to use shore power to reduce emissions during port calls. The results show that the shore power subsidy and the supply chain contract can improve the profit of the port and shipping supply chain. The integrated revenue-sharing-cost-sharing contract has a better coordination effect than the single revenue-sharing contract.