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Governments have strong incentives to allow their inventors to free ride on foreign technologies. They can achieve this result by discriminating against foreigners in the patent system-by refusing to grant foreigners a patent for their inventions. International patent law treaties forbid this practice, which may lower the global innovation incentives and may hurt international trade. Using data on half a million inventions submitted to the Chinese patent office, we find robust evidence of anti-foreign bias in the issuance of patents in 'strategic' technology areas. Foreigners are about fifty per cent more likely to be refused a strategic patent than locals.
Jérôme Baudry, Nicolas Christophe Chachereau, Bhargav Srinivasa Desikan, Prakhar Gupta