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Based on the current status of technological innovation ability of industrial enterprises in China, this work used Cobb Douglas production function to analyze the impact of R&D personnel investment, effective patent quantity and enterprise R&D expenditure on technological innovation ability of industrial enterprises. Then, this work used variable coefficient model of panel data to analyze differential impact of enterprise R&D investment on technological innovation ability. The research results show that the number of effective patents and R&D personnel have no significant impact on technological innovation ability, while the impact of enterprise R&D expenditure on technological innovation ability is positive, and areas with high input have low elasticity. Keywords—R&D investment; Technological innovation ability;

The Impact of R&amp;D Investment on Industrial Enterprises' Technological Innovation Ability —Based on Data from Ten Provinces and Cities on the Eastern Coast of China