农产品供应链质量安全中区块链技术投入的演化分析

针对农产品质量安全的不确定性，及引入区块链技术能提高农产品质量安全溯源信息的可信度，建立了基于区块链技术投入的农产品供应商与加工者的演化博弈模型，并对模型的动力系统和策略稳定性进行了分析和系统模拟仿真。研究发现：企业进行区块链技术投入的策略与其投入后市场需求增加率有直接关系，随着市场需求增加率的变化，系统出现多种演化稳定均衡。政府的补贴机制，能解决企业进行区块链技术投入中存在的“搭便车”问题；促使供应链的成员企业均进行区块链技术投入。研究结果对政府策略的制定和企业进行区块链技术投入决策具有一定的启示。

Evolution Analysis of Blockchain Technology Investment Based the Quality and Safety of Agricultural Supply Chain

Aiming at the uncertainty of the quality and safety of agricultural products, and the positive external effect that the introduction of blockchain technology can improve the credibility of the quality and safety traceability information of agricultural products, evolutionary game model was set up that Agricultural product producer and processors choose block chain technology for quality and safety investment. The replication dynamic and evolutionary stable strategy was analyzed, and system simulation was carried out. The results show that the enterprises’ investment in blockchain technology is directly related to the market demand growth rate after investment, which changes with the market demand growth rate, and various stable equilibria of evolution occur in the system. The subsidy mechanism of the government can solve the “free rider” problem of nodal enterprises in block chain technology input and encourage supply chain enterprises to invest in block chain technology for quality and safety. The research results have some implications for the formulation of government strategies and the investment of block chain technology by enterprises.