The Impact of Public Policies on Innovation and Imitation: The Role of R&D Technology in Growth Models
研究政府补贴和专利执法如何影响创新与模仿活动，发现研发技术的凸性会改变传统线性假设下的政策效果，并影响最优政策设计。
It has been shown under the assumption of linear R&D technology that a government subsidy to imitative (innovative) R&D decreases (increases) imitative effort but increases (decreases) innovative effort, and that strengthening the enforcement of patent laws leads to a decrease in innovative R&D but to an increase in imitative R&D. By replacing the linear R&D technology with a sufficiently convex R&D technology, we have shown that the counter‐intuitive results are reversed. In the case of linear R&D technology, the socially optimal R&D policies and activities are indeterminate, but with convex R&D technology, optimal innovation and imitation subsidies would induce the market to generate socially ‘balanced’ innovative and imitative activities.