规模报酬递减下的企业研发行为与政府政策

在质量阶梯模型的基础上，通过引入SZ模型讨论了企业研发投资规模报酬递减条件下企业研发行为和政府的研发政策，为领先企业提供研发补贴并对后来居上的企业征税，可以实现研发资源配置的帕累托最优。补贴率和征税率取决于领先企业的研发成本优势和产品需求弹性。对模型结论进行了必要的分析和修正，并结合我国产业现状指出，适当下放研发激励政策制定权限，针对企业实施事前差别性补贴应是进一步的改革方向。

Firm's R&D Activities and Government Policies under Diminishing Returns to Scale of Firm's R&D

Based on quality ladder model,together with the introduction of SZ model,this paper discusses the R&D efforts of enterprise and relevant goverment R&D policy under the assumption of diminishing returns to scale of firm's R&D,thus puts forward that we can realize the optimal distribution of R&D resources through providing leading firms with subsidies,while imposing taxes on later comers.The subsidy rate and taxation rate depend on the R&D cost davantage of leading firms and product demand elasticity.Finally,in terms of model analysis and adjustment in combination with our present industry situations,we point out properly easing controls on R&D incentives policy establishment and performing exant discriminate subsidy should be our further reform directions.