Globalization, Innovation, and Margins of Sourcing

Abstract This paper uncovers that input tariff reductions result in less domestic innovation, but standard models of trade ensure a positive correlation between importing and innovation. Hence, the paper develops a dynamic framework with a task-specific laboraugmenting productivity and a non-homothetic import demand system to rationalize this finding. The model implies that input liberalization enables firms to use cheaper intermediate imports as a substitute for self-made inputs, a strategy that decreases marginal production costs but also discourages firms from investing in their own inhouse varieties. Finally, the paper compares the effectiveness of trade and innovation policies in boosting aggregate productivity growth.