Coordination of competing supply chains with news-vendor and buyback contract

Under the competing supply chain framework, we examine the impact of buyback policy on retail price, order quantity and wholesale price in a duopoly of two manufacturer-retailer supply chains. Demand is assumed to follow a general distribution similar to a newsvendor case. We consider two channel policies for both competing supply chains: Vertical Integration (VI) and Manufacturer's Stackelberg (MS). We show that buyback strategy can lead to a higher profit than non-buyback in both VI and MS in competing supply chains, which is consistent with existing result in a single supply chain. We also show that the profits obtained by the supply chain individuals and the entire supply chain profit increase as the chain competition increases.