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With the increasingly fierce market competition, the suppliers in order to gain advantage in the competition to attract customers and stimulate demand, increase market share, most vendors typically provide retailers with deferred payment policy, allows retailers in a given period extension pay for the goods. Deferred payment as a time discount, in reality commercial transactions, has been widely used. For retailers, how to effectively use the deferred payment policy providers, and to develop appropriate pricing and purchasing strategies, have gradually become the focus of their concern. More especially in the face of a metamorphic features product procurement, retailers procurement need to consider the risks faced bigger, how to develop pricing based on deferred payment and procurement strategy is particularly prominent and important. For the deferred payment, usually divided into two categories: single-stage deferred payment, deferred payment and a two-stage. If you only consider the supplier allows retailers to the case of charges for late payment, called single stage deferred payment; On this basis, the retailer also allows his customers deferred payment, deferred payment referred to as two-stage. In past scholars basis of deferred payment summarize, from the retailer's perspective, the procurement cost and procurement time and purchase quantity also related to the deferred payment for the assumption that perishable products as the research object, consider as a research focus, the retailer's pricing and purchasing strategies, the use of optimization theory and search algorithms, deferred payments under the retailer's pricing and purchasing strategies, respectively, of the single-stage and two-stage study. Overall, this paper is mainly to complete the following three aspects: the first part: the deferred payment of the literature review. Be paid by the introduction of the extension of the contract as well as real business use, analysis and comparison of the domestic and foreign deferred payment, summed up the lack of existing research, the list of possible research direction. Part II: single-stage deferred payments under the retailer's pricing and purchasing strategy. Deferred payment based on a single stage, a supplier and a retailer's supply chain system, consider a fixed rate of deterioration of the product, the procurement costs associated with the procurement time and purchase quantity to the retailer's profit maximization optimization goals modeling, and design the corresponding algorithm to obtain optimal pricing and purchasing strategies of retailers, while the completion of the sensitivity analysis of key parameters. Part III: two-stage deferred payments under the retailer's pricing and purchasing strategy. Lack of literature brief review and summary of the two-stage extension to pay existing research position basis, deferred payment for the current two-stage extension to pay, based on a two-stage, a supplier, a retailer, a retailer customer's supply chain system, consider a fixed rate of deterioration of the product, the cost of procurement, procurement and procurement quantity associated; demand is a linear function of the price, the retailer's profit maximization model optimization objectives and to design appropriate an algorithm to obtain the optimal pricing and purchasing strategies of retailers, while the completion of the sensitivity analysis of key parameters.
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