关键词: 退货决策, 两阶段电子商务, 回购合同, 再制造

Abstract: To optimize the supply chain of two-stage e-commerce,a kind of e-commerce supply chain model that adopted two-stage sales model of B2C and C2B in the lifecycle was developed.The return policy drew by customers with retailer's returns compensation in first stage and the effect of customer's return policy in first-stage reaction on optimal order quantity and optimal profit of retailers in second stage were analyzed respectively.The analysis result showed the different optimal return prices were existed in two-stage sales model of B2C and C2B.Retailers'optional return price could be changed by supplier repurchases and return remanufacturing to achieve two-stage coordination.On this basis,different types of supplier repurchases contracts were analyzed,and the results showed that two-stage supply chain could be effectively coordinated with differential repurchases contracts.In addition,the supply chain's overall profit could be increased effectively by differential repurchases contracts in supplier remanufacturing on the promise of the non-perishable products and remanufactured goods be accepted by customers.

Key words: return policy, two-stage e-commerce, buy-back agreement, remanufacturing