Human Capital and Firm Innovation: Evidence from China's Higher Education Expansion in the Late 1990s

In this paper, we take the "university enrollment expansion" policy implemented by the Chinese government in 1999 as a quasi-natural experiment and use the difference-in-differences method to identify the effect of human capital expansion on firm innovation. Findings suggest that human capital expansion significantly improves firm innovation performance. More innovation is realized by promoting firms' invention patent applications than their design and utility model patent applications. Further analysis highlights the varying impact of human capital expansion on the innovation performance of firms of different types, thus indicating significant heterogeneity. This study enriches the innovation literature on the drivers of firm innovation by identifying the role of human capital while providing new empirical evidence from the perspective of firm innovation to further understand the microeconomic effects of human capital.