Investment in capital goods is a key determinant of productivity and economic growth. At the same time, machinery production is more geographically concentrated than other manufactured goods and strongly correlated to the R&D intensity across countries. Therefore, international trade in capital goods is expected to increase countries' access to different technologies and to have a growth effect beyond the traditional allocative efficiency trade gains. This dissertation focuses on the effects from capital goods trade policy on firms performance, welfare and technology diffusion. The first chapter investigates the effect of a reduction in capital goods import tariff on firms' trade performance. To do so, I bring together rich data from...