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vaccination, recovery or a recent negative test, and have required individuals to show certificates to access shops, restaurants … been investigated. To estimate these effects, we construct counterfactuals based on innovation diffusion theory for France …
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Can directed technical change be used to combat climate change? We construct new firm-level panel data on auto industry innovation distinguishing between "dirty" (internal combustion engine) and "clean" (e.g. electric and hybrid) patents across 80 countries over several decades. We show that...
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