中文摘要：

闭环供应链的长期优化和发展,是发挥其正外部性的重要前提。多回收商竞争是我国诸多闭环供应链的重要特征之一。在对两回收商竞争性回收价格研究的基础上,采用多Agent模型,用数值模拟的方法进一步研究了多回收商进行成本优化并相互竞争的闭环供应链回收问题。研究结果显示,回收商进行成本优化时,其回收量和总利润都远高于成本固定时的相应数值。回收成本优化对于闭环供应链的长期协调,有着极其重要的意义。为了推进我国闭环供应链实践,政府应补贴回收商成本优化的努力,而不是仅直接补贴回收价格。

英文摘要：

Long-term optimization and development of closed-loop supply chain is an important premise to its positive externalities.The competition among many recyclers is one of the important characteristics of some closed-loop supply chains in China.Based on the study of recycling prices with two recyclers＇ competition,this paper studies the recycling price in closed-loop supply chains when many recyclers take cost optimization and compete with each other though Multi-Agent modeling and simulation.The results show that the recycling quantity and total profits when recyclers take cost optimization are much higher than that of situation with fixed cost.Recycling cost optimization for long-term coordination of closed-loop supply chain is extremely important thus to promote the closed-loop supply chain practice,the government should subside recyclers＇ cost optimization efforts rather than directly subsidies recycling prices.