Research On Supply Chain Network Equilibrium Issues Considering Manufacturers' R&D Investment

Few of protection of intellectual property rights cause serious copying,imitation phenomenon in the society now,in order to investigate the correlation between the protection of intellectual property rights to the various manufacturers and other members in the supply chain network,this paper established a supply chain network equilibrium model with R&D spillover effect in which consists of multiple manufacturers,retailers and demand market.In order to obtain greater profits,manufacturers will be spending on research and development to improve technology level and reduce the production unit cost of products,but maybe will lead the R&D spillover effect.Using the equilibrium theory and variational inequalities,get equilibrium conditions of the various manufacturers,retailers with considering R&D spillover effect,and deduces the whole supply chain network equilibrium conditions.Is given the algorithm to solve the equilibrium conditions and a numerical example,analyzes the manufacturer's R&D spillover effect produced by the influence of the decision-making of supply chain network members.The main content and innovation points of this article are as follows:(1)Is studied a manufacturer R&D static supply chain network equilibrium problem considering the spillover effect of innovation,established the supply chain network equilibrium model with multiple manufacturers,retailers and consumer market,using the variational inequality describes every manufacturer and the retailer's optimal decision,the whole supply chain network equilibrium conditions is deduced.Combined with the result of a numerical example,this paper analyzes the influence of spillover effect on manufacturers R&D input and the entire supply chain network equilibrium,found innovation spillover will reduce enterprises,especially high levels of innovation and enterprise development initiative and profits.(2)Is studied manufacturer R&D dynamic supply chain network equilibrium problem considering the spillover effect,built up a dynamic supply chain network equilibrium problem consist of manufacturers,retailers,using differential variational inequality describes each manufacturer and retailer's optimal decision,gain the dynamic equilibrium conditions of the whole supply chain network.Through numerical example,the paper analyzes the dynamic change in market conditions under the condition of each manufacturer's R&D spillover effect,found that increasing demand and lower spillover will improve the enterprises' enthusiasm on innovation.