Effects of patents on the transition from stagnation to growth
用增长理论分析知识产权如何影响经济从停滞转向持续增长，发现加强专利保护会促使转型提前，但长期会降低经济增长。
Abstract This study provides a growth-theoretic analysis of the effects of intellectual property rights on the take-off of an economy from an era of stagnation to a state of sustained economic growth. We incorporate patent protection into a Schumpeterian growth model in which take-off occurs when the population size crosses an endogenous threshold. We find that strengthening patent protection has contrasting effects on economic growth at different stages of development. Specifically, it leads to an earlier take-off but also reduces economic growth in the long run.