Abstract: A supply chain system is constituted by a supplier,a retailer and customers,in which the customers are of strategic behaviors.Strategic customers,anticipating future price paths and time their purchases,can choose to buy in the first selling period,or choose to wait for returned products in the second selling period in order to maximize individual surplus.In the first selling period the retailer orders a quantity from the supplier and sells products in the first market.In the end of first selling period,the remaining products are bought back by the supplier.In the period of second selling,the supplier sells the returned products.The results of parameter and numerical study are following.First,whether strategic customer behavio rcould impact the supply chain’s performance and ordering depends on customer acceptance of the secondary market.Second,buyback contracts,which depend on the first-best ordering quantity of the centralized supply chain,can coordinate the decent ralized supply chain,and the first-best buyback price is irrelevant with strategic customer behavior.Finally,whether the retailer accepts the buyback contracts depends on strategic customer behavior and the customer acceptance of the secondary market.

Key words: Strategic customer behavior, buyback contract, secondary market, supply chain system’s performance