| Issue |
E3S Web Conf.
Volume 275, 2021
2021 International Conference on Economic Innovation and Low-carbon Development (EILCD 2021)
|
|
|---|---|---|
| Article Number | 03004 | |
| Number of page(s) | 4 | |
| Section | Environmental Protection and Governance Innovation Technology Research | |
| DOI | https://doi.org/10.1051/e3sconf/202127503004 | |
| Published online | 21 June 2021 | |
Do patent bubbles exist? Test on innovation situation in China’s A - share market
School of Economics and Management, Beijing Jiaotong University
* Corresponding author: zoeywry@126.com
China’s expanding patent applicants reflects the results of the innovation catch-up strategy, but there have been persistent doubts about patent bubbles. Using SADF, GSADF and BSADF tests, this paper found that the phenomenon of the patent bubble is not common during the observation period in China’s listed companies from 2007 to 2019, and different degrees of patent bubbles occurred only in four industries. China’s technology market is still in the stage of innovation accumulation and catch-up.
© The Authors, published by EDP Sciences, 2021
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