Shipping inside the box: Containerization and trade 1 1For their comments and constructive suggestions, we thank Zouheir El-Sahli, James Harrigan, Eduardo Morales, Andrés Rodriguez-Clare, and numerous seminar participants. Demir thanks CESifo/Ifo Institute for their hospitality. Sümeyra Korkmaz provided valuable research assistance in the early stages of this work. We also thank Gönül Şengül for suggesting the current title of the paper.