Abstract: Successful innovation depends on the stock of knowledge that innovators have access to. Yet, empirical analysis of the impact of trade on innovation abstracts from such knowledge diffusion. We address this gap in the literature by drawing upon the universe of Indian patent applications between 1995 and 2006, which we map to a spatially granular level. We use this original dataset to provide the first evidence of how knowledge diffusion shapes the innovation response of firms facing import competition. We find that, on average, import competition lowers innovation. However, firms that are close to other patenting firms (knowledge access) innovate more: a firm with the 80th percentile knowledge access increases its patents by 3.28% after experiencing a 10% increase in imports. These results suggest that the pre-existing spatial distribution of innovators is an important determinant of how import competition will affect overall innovation.

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