Abstract: E-commerce platforms usually charge fees for technical service, marketing and sales promotion from enterprises on them. The proportion of fees as a percentage of sales, that is, the commission rate of e-commerce platforms cannot be neglected in the pricing of enterprises on platforms. In view of this, the coordinated pricing problem of the dual channel supply chain with the commission rate of the e-commerce platform was considered. At first, a centralized pricing model that pursues the maximization of the profit of the supply chain is constructed, and the optimal online and offline channel sales prices are obtained. The prices, sales volume and profit changes under the influence of the commission rate are analyzed, and the decision range of the commission rate is gradually defined. Then, based on the optimal profit of enterprises under decentralized decision, a coordinated pricing scheme based on Shapley Value was designed to determine the optimal wholesale price of the offline channel. Finally, numerical analysis and simulation were carried out by Mathematica 11. This paper is of great significance for explaining the mechanism of the coordinated pricing in the dual channel supply chain and the changing of the related indicators due to the impact of the commission rate and promoting the benign interaction between enterprises and e-commerce platforms.

Key words: dual channel supply chain, coordinated pricing, commission rate, Shapley Value