基于1990-2012年中国飞机制造业及相关产业的样本数据,利用改进的Grillches-Jaffe知识生产函数,实证分析了企业自筹资金和政府科技资助等对飞机制造业创新产出的影响.结果表明:在飞机制造业R&D活动中,企业自主投资对创新产出的影响比政府直接投资大,前者的产出弹性达到0.905 929,而后者仅为0.206 212;另外,政府资助公共研发单位在基础知识领域的研究对飞机制造业R&D产出也显示出正的溢出效应,产出弹性为0.147 512.可见,为促进飞机制造业创新发展,政府在利用其科技资助直接及间接效应的同时,也要积极采用政策激励手段刺激企业自身的科技投入.
Based on the sample data of aircraft industry and related industry from 1990 to 2012 in China and improved Grillches-Jaffe knowledge production function, the influence of finance resource came from enterprise itself and Government Science & Technology Funding on innovation output of aircraft industry is analysed empirically. The study indicates : in aircraft industry' s R&D activities, the influence of enterprises' self-directed investment on innovation output is greater than the government's direct investment, and the enterprise capital's output elasticity is 0.905 929, the output elasticity of government funding is only 0.206 212; In addition, researches in the field of fundamental knowledge of aircraft conducted in public research and development units funded by the government shows positive spillover effects on aircraft industry's innovation output, the output elasticity is 0.147 512. Thus it can be seen that to promote the development of aircraft industry innovation, Chinese government should not only use its direct and indirect effect of science and technology funding, but also adopt policy incentives to stimulate investment in science and technology of enterprises.