In this study, pricing in closed loop supply chain with consideration of different product collecting structures has been examind. Three categories of product collecting structures are studied. Three single-channel structures in the first category, three two-channel structures in the second category, and one three-channel structure in the third category are studied. In all structures there is a manufacturer and a retailer. In the first structure, the products are collected by the manufacturer. In the second and third structures, the product collection operations are assigned to the retailer and the third party, respectively. In the fourth, fifth and sixth structures, product collection is done separately by two separate channels. In the fourth and fifth structures, the manufacturer collects the products along with a retailer and a third party respectively
