This paper studies a collection channel selection issue in a closed-loop supply chain (CLSC) consisting of a manufacturer, an e-commerce platform and a third-party collector. Three collection modes are available to the manufacturer who lacks collection capability, that is, platform collection (mode P), collector collection (mode C) and dual-channel collection (mode D). After collection, the manufacturer remanufactures and sells remanufactured products through the platform. We formulate a two-echelon Stackelberg game in which the manufacturer is...