Coordination of quality, retail price, marketing investment and logistic investment based on the game of quality and price in SCM

According to the supply chain theory, we consider the enterprise is in the supply chain, which has the intimacy interactivity and game relationship. We establish a competition model of one product in the one stage to multiple suppliers. Every supplier needs to check the strategy and provide a wholesale price as the supplier pricing strategy, while retailer needs to choose which suppliers to order, how many to order, and quality control strategy. We also provide model groups: the first model is the supplier only announces the wholesale price; the second model is the supplier provides the whole sale price and quality level; the third model, retailers announce their test level for the product before they know the whole sale price and quality level from supplier. And we also provide the compare for the three models and discuss how to improve.