This article investigates a closed-loop supply chain consisting of a manufacturer, two suppliers and two competitive retailers. One retailer sells manufactured products whereas the other retailer sells remanufactured products and takes up corporate social responsibility (CSR). One supplier supplies used products or cores for remanufacturing while the other supplier supplies fresh raw materials for manufacturing new product. The manufacturer sells both new and remanufactured products with different wholesale prices. The paper analyzes the two competitive retailer's different game strategies when the manufacturer acts as the Stackelberg leader. It is shown that remanufacturing is a good policy to adopt for the whole supply chain, not only for economical benefits but also for environmental sustainability. Optimal decisions of the proposed closed-loop supply chain and its members are also supported by a numerical example. Finally, sensitivity analysis is carried out with respect to key model-parameters.

本文研究了由制造商，两个供应商和两个竞争零售商组成的闭环供应链。一个零售商出售制成品，而另一零售商出售再制造产品并承担企业社会责任（CSR）。一家供应商提供用过的产品或铁芯进行再制造，而另一家供应商则提供新鲜的原材料来制造新产品。制造商以不同的批发价格出售新产品和再制造产品。当制造商担任Stackelberg领导者时，本文分析了两家竞争零售商的不同游戏策略。结果表明，再制造是整个供应链的一项好政策，不仅是为了经济利益，而且是环境可持续性。数值示例也支持了拟议的闭环供应链及其成员的最优决策。最后，针对关键模型参数进行了敏感性分析。