Due to excessive greenhouse gas emissions, carbon emission-reducing measures are urgently needed. Important emission-reduction measures mainly include carbon trading and low-carbon cost subsidies. Comprehensive consideration of these two policies is a research hotspot in the field of low-carbon technology investment. Based on this background, this paper considers the impact of consumer low-carbon preferences on market demand and the impact of uncertainty in carbon emission-reduction behaviour. We construct a stochastic differential game model with upstream and downstream enterprises based on cost-sharing coordination under a cost subsidy. From a dynamic perspective, this paper researches the optimal equilibrium strategy and evolution characteristics of the joint emission-reduction mechanism in a supply chain. This paper discusses the sensitivity of the parameters and uses numerical simulation to verify the impact of each parameter on the emission-reduction decision-making activities of stakeholders after introducing the cost subsidy. The results show that a cost subsidy policy can promote carbon emission-reduction investment and supply chain profit. Thus, it is important to strengthen technical cooperation and exchange among enterprises.

中文翻译：

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基于随机性和低碳偏好的碳减排技术供应链投资

由于过量的温室气体排放，迫切需要减少碳排放的措施。重要的减排措施主要包括碳交易和低碳成本补贴。全面考虑这两项政策是低碳技术投资领域的研究热点。基于此背景，本文考虑了消费者低碳偏好对市场需求的影响以及碳减排行为不确定性的影响。在成本补贴的基础上，基于成本分担协调，我们与上下游企业建立了随机的差分博弈模型。从动力学的角度，研究了供应链中联合减排机制的最优均衡策略和演化特征。本文讨论了参数的敏感性，并在引入成本补贴后，通过数值模拟验证了各参数对利益相关者减排决策活动的影响。结果表明，成本补贴政策可以促进碳减排投资和供应链利润。因此，加强企业之间的技术合作与交流非常重要。