| With the rapid development of industrialization and urbanization,environmental destruction and pollution have brought about global warming,greenhouse effect,extreme weather and other issues.The development of the economy while slowing global warming and controlling greenhouse gas emissions has become important in all fields.At the same time,more and more companies are actively responding to policies to implement carbon emission reduction and shoulder corporate social responsibility.However,how to balance economic benefits and environmental responsibilities in the fierce competition is the key content of corporate decision-making.Consumers’ low-carbon preference makes it difficult for manufacturers to accurately grasp market demand,leading to information asymmetry and reducing supply chain efficiency.Effective information sharing can coordinate the behaviors of supply chain members and improve supply chain performance.Therefore,it is of great significance to study information sharing issues in the supply chain under the actual requirements of carbon emission reduction.This paper studied the supply chain demand information sharing model and incentive mechanism considering manufacturer competition and carbon emission reduction.First,under the condition that the retailer’s demand forecast information was not shared,the supply chain composed of two manufacturers and one retailer was used as the research object to analyze the influence of competition intensity and carbon emission reduction efficiency on the optimal decision-making and profit of the supply chain.On this basis,considering retailer demand information sharing,three information sharing modes included demand information sharing with a single manufacturer,demand information sharing with two manufacturers,and centralized decision-making in the supply chain were researched.The decision-making under different information sharing modes were analyzed.Comparing the changes in profit,the value of sharing demand information of supply chain members was analyzed.Under the condition that information sharing is beneficial to the supply chain,the Nash negotiation information sharing incentive mechanism was designed separately for the demand information sharing with one manufacturer and the demand information sharing mode with two manufacturers to encourage retailers to share private information;for supply chain concentration decision-making model,Shapley value was used to redistribute supply chain profits,which promotes the realization of information sharing,and improve the overall performance of the supply chain.The research results show that:(1)When the retailer’s demand forecast information is not shared,the demand forecast information only affects the retailer’s decision and does not affect the manufacturer,and the sales price increases with the increase of demand forecast information.When the forecast is more optimistic,the sales price is directly proportional to the accuracy of the forecast;as the intensity of competition increases and the carbon emission reduction cost coefficient decreases,the wholesale price of manufacturers,the level of carbon emission reduction,and the retail price of retailers increase,and retailers and suppliers The conditional expectation of the chain also increases profit.Therefore,fierce competition among manufacturers and high carbon emission reduction efficiency are conducive to improving the level of carbon emission reduction and the profits of retailers and the supply chain.Manufacturers pursue fierce competition,but when competition is fierce,manufacturers should reduce carbon emission reduction efficiency and gain an advantage in wholesale prices to increase their own profits;(2)Considering manufacturer competition and carbon emission reduction supply chain In,the different information sharing modes of retailers make the optimal decision of the manufacturer who obtains the shared information change.When the forecast is more optimistic,information sharing can reduce the manufacturer’s carbon emission reduction level and wholesale price,and the corresponding retailer needs to increase the sales price.Demand information sharing does not change the impact of carbon emission reduction cost coefficient and competition intensity on the optimal wholesale price,carbon emission reduction level,sales price and optimal expected profit.Supply chain companies should continuously improve carbon emission reduction efficiency under different information sharing modes,To obtain a low-carbon competitive advantage;(3)Retailers demand information sharing to reduce retailer profits.In the supply chain operation process,retailers will not actively share demand forecast information.Manufacturers gaining advantages from shared information bring increased profits,and when both manufacturers obtain shared information,the manufacturer’s profits increase even more.Therefore,the two manufacturers will actively take measures to promote retailer information sharing.At the same time,the greater the intensity of competition,the greater the profits that manufacturers can obtain from information sharing.Therefore,manufacturers should continuously strengthen the intensity of competition among enterprises to obtain higher profits;(4)When carbon emission reduction efficiency is high,Information sharing improves supply chain profits.On this basis,the Nash negotiation information sharing mechanism is designed for the demand information sharing mode with a single manufacturer and the demand information sharing mode with two manufacturers.The Nash negotiation information sharing incentive mechanism determines the information sharing fee paid by the manufacturer,and verifies the effectiveness of the information sharing incentive mechanism through numerical examples,promotes retailers to share demand forecast information,and improves the overall performance of the supply chain;(5)Supply The chain-focused decision-making model improves the carbon emission reduction level of the supply chain and reduces the sales price of the product.At this time,the supply chain reaches the Pareto optimum.Through the Shapley value,the expected profit of the centralized decision-making of the supply chain is redistributed,so that the profit after the distribution is greater than the profit of the supply chain members without sharing the demand information.An example is used to verify the effectiveness of the Shapley value profit distribution mechanism.Combining the social practices of enterprises,all enterprises should proactively seek cooperation and information sharing from the perspective of the overall supply chain,and through a reasonable profit distribution mechanism,while increasing their own profits,they can improve their supply chain performance and competitive advantages and achieve sustainable development. |