When firms operate production plants in multiple countries, technological improvements developed in one country may be shared with firm sites abroad for efficiency gain. We develop a dynamic model that allows for such intrafirm transfer, and apply it to measure the impact of innovation on performance for a panel of U.S. multinationals. Our estimates indicate U.S. parent R&D raises performance significantly at firm locations abroad, and also complements R&D by affiliates. Parent R&D is a substantially more important determinant of firm performance than affiliate R&D. We identify these R&D effects using variation in location-specific innovation policies.
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