This book explores the relationship between exports and productivity. Whilst a body of research indicates that exporters have superior productivity to non-exporters, received wisdom suggests that this is because productive firms became exporters. Robert Salomon approaches this issue from a different angle. He argues that exporters can access diverse knowledge inputs that are not available in the domestic market, and that this knowledge can spill back to the focal firm and, through learning, can foster increased innovation. Therefore, exporting can also make firms more productive.