The landscape of Chinese invention patents: Quantity, density, and intensity

Yingcheng Li, Nicholas Phelps, Zhicheng Liu and Haitao Ma

Environment and Planning A, 2019, vol. 51, issue 4, 823-826

Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:sae:envira:v:51:y:2019:i:4:p:823-826

DOI: 10.1177/0308518X18824107

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