This volume investigates the fundamental mechanisms of international trade policy and the theoretical underpinnings of tariff structures. Harry Johnson, a prominent 20th-century economist, synthesizes complex mathematical models and classical trade theory to evaluate how protectionist measures influence national welfare and global market equilibrium. The text provides a rigorous examination of the relationship between domestic economic policy and international trade flows.

Economists and scholars frequently cite this collection as a foundational text for understanding the evolution of trade theory in the mid-20th century. Readers often note the high level of technical and mathematical density required to fully engage with the author's arguments.