As awareness of the process of globalization grows and the study of its effects becomes increasingly important to governments and businesses (as well as to a sizable opposition), the need for historical understanding also increases. Despite the importance of the topic, few attempts have been...

We show in a multi-sector, heterogeneous-firm trade model that the effect of tariffs on entry, especially in the presence of production linkages, can reverse the traditional positive optimal tariff argument. We then use a new tariff dataset, and apply it to a 189-country, 15-sector version of...