International comparison of R&D investment on the basis of gray incidence theory

The paper calculates the grey incidence degree of the Research and Development investment and Economic Development in some countries on the basis of the grey incidence theory in the main three performance sectors. The results demonstrate that the investment of science and technology talents is more important than R&D expenditure in promoting the development of economy. R&D expenditure gets higher degree of grey incidence in government performance sector than the researchers in China. The researcher input in business enterprise sector should be improved. To be supported by more R&D funds is necessary for the high education sector.