Abstract: The paper studies the decision problem of a two-echelon supply chain consisted of one supplier and one retailer under the situation of time-and price-sensitive demand,where the supplier decides the delivery time and the wholesale price,and the retailer decides the retail price.Through analyzing the decision process in decentralized mode and centralized mode,the formulations of the optimal decisions for two modes are presented.Moreover,a new combined contract is designed for the perfect coordination of the supply chain.

Key words: time-and price-sensitive demand, decision mode, supply chain, perfect coordination