This paper considers a secondary low-carbon supply chain consisting of one manufacturer and one dual-channel retailer. The four game models of retailer in the two-channel unified pricing and separate pricing and the two power structures dominated by manufacturer and retailer are constructed. The paper analyzes and compares the choice of retailer pricing methods under the same power structure and the optimal decision of supply chain members under different power structures. Research shows that a retailer is more willing to choose separate pricing under the same power structure, and pricing methods have no effect on the manufacturer. Under different power structures, retailer gains more when he leads the supply chain. For the manufacturer, when the carbon emission reduction investment cost coefficient is small (large), manufacturer gains more when retailer (self) dominates.
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