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副产品交易是组成副产品交换网络的基本单元,对循环利用具有重要意义.该文选取“单一产生企业—单一利用企业”废弃利用链,在存在原生材料合约市场和现货市场、消费者对再生品和新品无需求偏好的条件下,利用期望-方差效用函数,对副产品交易双方的最优合约供应量和采购量进行了决策优化;然后利用合约量和现货量间的关系建立了一个合约和现货双市场的副产品交易决策模型,并对副产品合约交易条件进行了经济性分析;最后通过案例,对模型进行了应用,为相关企业的决策提供理论依据.
By-product transactions constitute the basic unit of the byproduct exchange network, which is of great significance for recycling. This article chooses the “single production enterprise - single utilization enterprise” discarded utilization chain. In the existing raw material contract market and spot market, Products and new products under the condition of no demand preference, using the expectation-variance utility function to optimize the optimal contractual supply and purchase quantity of the byproduct transaction parties; and then using the relationship between the contract amount and the spot amount to establish a contract and The analysis of the by-product transaction decision-making model of the spot and the dual market, and the economic analysis of the transaction conditions of the by-product contract; Finally, through the case, the model is applied to provide a theoretical basis for the decision-making of related enterprises.