Comparative Analysis Of Supply Chain Inter-chain Competition Based On Low Carbon Preference And Carbon Tax Policy

With the continuous accumulation of the greenhouse effect in recent years,global warming is increasing,various extreme climates are becoming more frequent,and the global ecological environment is becoming more and more fragile.In the face of severe climate and environmental disasters,countries around the world have reached a series of agreements such as the Kyoto Protocol and the Paris Climate Change Agreement to reduce greenhouse gas emissions such as carbon dioxide.In order to achieve their respective emission reduction targets,various participating countries have introduced various forms of carbon emission policies such as carbon tax and carbon cap-and-trad.At the same time,the popularization of environmental protection propaganda has made consumers' awareness of energy conservation and emission reduction deeper.The concept of green production and green consumption is deeply rooted in the hearts of people.For this reason,many developed countries have incorporated product carbon footprint identification into global supply chain strategic management.Based on the realistic background of global low-carbon policies and low-carbon preferences of consumers,this paper constructs a benchmark inter-supply chain competition model that does not consider low-carbon policies and low-carbon preferences,and a low-carbon supply chain model that considers carbon tax policies and low-carbon preferences.The model consists of two supply chains – a high carbon supply chain and a low carbon supply chain.The low carbon policy assumes that the government imposes a unit carbon tax on the high carbon supply chain.According to the different structure of the supply chain market,the benchmark model and the low carbonization model are solved separately.Through the theoretical model,the paper analyzes the impact of carbon policy and low carbon preference on the average total cost,profit rate and carbon emission level of high carbon supply chain.Finally,the relevant conclusions are verified by numerical simulation.The results of the study show that the supply chain in the leading position always obtain greater profits than at the equivalent status.Due to the low carbon R&D costs and carbon tax,the average total cost of the high carbon supply chain will decrease and the cost advantage of a high-carbon supply chain weakens or even disappears.Profit,supply chain unit carbon emissions and profit rate of the high carbon supply chain will decrease when it's in leading position or at equivalent status.The study also shows that under the same conditions,when the high-carbon supply chain is in the leadership position,the optimal unit product carbon emission level is the lowest,and the highest when the two supply chains make decisions at the same time.