1. Research on the threshold effect of technological innovation———Base on the perspective of protection of intellectual property rights and technology difference;Dang;Journal of Industrial Technological Economics,2016
2. Hirschey (2012). The size, concentration and evolution of corporate R&D spending in U.S. firms from 1976 to 2010: Evidence and implications. Journal of Corporate Finance (6), 496–518.
3. Research on China’s optimal intellectual property protection interval——Based on independent R&D and international technology import;Li;Nankai Economic Studies,2013
4. Intellectual property protection source of financing and corporate innovation: Evidence from cross country micro data;Li;Economic Review,2015
5. Study on the relationship between government R&D investment, intellectual property right protection and enterprises R&D investment;Li;Studies in Science of Science,2016