We empirically investigate the impact of state ownership on the private economic value and the scientific value of Chinese publicly listed firms’ innovation from 2003 to 2020, and explore its mechanism. We show that the stock-market-based methodology of estimating patent value proposed by Kogan et al. (2017) applies to the Chinese economy, and follow their approach to evaluate patents issued to Chinese listed firms. Using this new data and patent citation data, we find that state-owned enterprises have lower private value of innovation than non-state-owned enterprises, while their scientific values of innovation are not significantly different. We also provide evidence that the state-owned enterprises’ low profit-oriented R&D performance is due to their insufficient capabilities rather than ownership-specific corporate objectives.

A second-tier patent system with relatively low protectability standards has been adopted by many countries, but empirical evidence on how it is used by firms israre. Using Chinese patent data, we exploit “parallel filings” – where a second-tierpatent is filed simultaneously with an invention patent – to shed light on its usein practice. The data indicate that while parallel filings appear to be inventionswith a narrower scope, they are cited more frequently in the early years and morelikely to be licensed or transferred compared to inventions protected by standardpatents. We provide evidence that parallel filing is likely a strategic choice forshort-life-cycle technologies that achieve high value early in their lifetime but decayfast. The rapid issuance of the second-tier patent facilitates knowledge diffusionand technology transfer, thereby helping the patentees capitalize on the value of fast-moving technologies. This study provides some much-needed empirical evidenceon how the quick procedure of the second-tier patent system serves short life-cycletechnologies.