Agents’ incentives under buy-back contracts in a two-stage supply chain Supply chain coordination under buy-back contract with sales effort effects Efficient Partnership Dissolution under Buy/Sell Clauses Pricing and ordering decisions in a supply chain with imperfect quality items and inspection under buyback of defective items Stackelberg game in a two-echelon supply chain under buy-back coordination contract Portfolio Selection Under Buy-In Threshold Constraints Using DC Programming and DCA Study on a Two-echelon Supply Chain Inventory Model under Buy Back Contract Research on the pricing strategy of book-wholesalers under buy back policies Supply chain coordination under buy-back contract with sales effort effects销售努力水平影响需求情况下的供应链回购契约 Optimal Control for a Remanufacturing Reverse Logistics System under Buy-Back Policy