ade theory and policy that can be read straight through. The footnotes provide caveats, extensions and entry points, or further reading. This book is divided into three parts. The first part focuses on the core theoretical analysis of international trade that has evolved over a quarter-millennium. The second part reviews recent empirical research in global value chains, trade costs, and heterogeneous firms, particularly from analysing large datasets of individual firms' characteristics and of trade flows disaggregated to very finely detailed levels. The third section of the book analyzes trade policies and discusses current policy debates. This edition is based on Pomfret's Lecture Notes on International Trade Theory and Policy, first published in 2008. The content has been extensively updated and revised to stand as a new volume.