The scientists based their analysis on trade data from the UN Comtrade database and the Organisation for Economic Co-operation and Development's (OECD) patent database. The main limitation of this approach relates to the level of detail of patent information.
“Going beyond four-digit patents would have allowed for a more fine-grained analysis of the technologies underlying materials and components, as well as a more precise matching of the productive and technological sides,” the researchers said.
The research group presented its findings in the paper “Technological sovereignty and strategic dependencies: The case of the photovoltaic supply chain,” which was recently published in the Journal of Cleaner Production.
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