Sales effort competition in dual-channel supply chain based on a weakest retailer

The existence of both traditional market and electronic market complexities supply chain sales effort competition. A weaker online manufacturer who sells products in the internet only, at the same time the manufacturer lbeing a leader shares electronic markets and owns its weakest retailer in the traditional market. Focusing on sales effort, the paper finds out their optimal decisions, and conditions in which supply chain coordinates. After that, it analyses how manufacturers l´ channel sales effort effect affects three enterprises´ optimal revenues, optimal prices, etc.