Research on Supplier Development Strategy Considering Spillover Effect in Competitive Environment

Aiming at the optimal investment strategy of the manufacturer to the supplier, considering the film stars brought by the spillover effect in the investment process, the profit, investment level and the impact on the supply chain members of the manufacturer under the three investment strategies are studied. It is found that: (1) As long as the manufacturer invests, the profit obtained under the three investment strategies is always higher than that without investment and investment is always beneficial to suppliers; (2) In the case of one manufacturer's investment, the equilibrium solution of the manufacturer under three investment strategies is analyzed, and it is found that the investment manufacturer is more willing to invest in the supplier's portfolio; (3) When the manufacturer 's investment ability is high, the profit of non-investors may be higher due to the spillover effect, and the investment manufacturer will gradually reduce its investment level.