Research on the influence of R&D Investment on Firms' Performance --base on the perspectives of investment intensity and patent protection institution
Lin Zhouyu1,2, Lin Hanchuan2, Deng Xinghua3
1. School of Economics and Management, Fuzhou University, Fuzhou 350001, Fujian, China;
2. Research Center for Small and Medium Enterprise, University of International Business and Economics, Beijing 100029, China;
3. School of Public Policy and Management, Tsinghua University, Beijing 100084, China