Model Construction and Solution of R&D Investment Decision for Different Rational Level of Upstream and Downstream Enterprises

With market complexity and uncertainty intensifying, enterprises are more inclined to adopt cooperative innovation to strengthen their technological innovation capability. Cooperative innovation often involves a large number of upstream and downstream enterprises with their decision-making differences. Based on this, the decision process is divided into: deciding research and development(R&D) investment and determining the final two stages of commodity output. This paper builds different rational levels of upstream and downstream R&D cooperative investment decision-making model. The existence and stability of the system’s equilibrium point and the effect of R&D investment adjustment speed on the system state are discussed based on the analysis of the asymmetry and bounded rationality of R&D efficiency of the upstream and downstream enterprises.