From Global Sales to Global Manufacturing: The Impact of Interwar Tariffs on Jeffrey Manufacturing Company

This paper examines how interwar tariff regimes reshaped the global business strategy of the Jeffrey Manufacturing Company (JMC), a family-owned industrial firm headquartered in Columbus, Ohio, and a leading producer of coal mining machinery from the late nineteenth century through World War II. Pioneering innovations such as the electrically driven coal cutter and underground electric locomotive allowed JMC to expand early into international markets, with export sales across the Atlantic world, Africa, and Australia. By the 1920s, however, rising tariff barriers increasingly constrained export trade, forcing the firm to reconsider the relationship between global sales, manufacturing location, and long-term growth.

Drawing on extensive archival research from the Jeffrey family’s private corporate papers alongside local, state, and regional archival sources, this paper traces JMC’s strategic pivot from export-led growth to multinational manufacturing during the interwar period. In response to tariff barriers that inhibited the Company’s export sales, JMC acquired a manufacturing firm in Wakefield, England, and established a Canadian subsidiary in Montreal, reflecting a broader pattern of adaptation to economic nationalism through foreign direct investment. The paper situates these decisions within the wider political economy of the interwar Atlantic world, examining the combined pressures of U.S. trade policy, the Great Depression, and wartime mobilization.

While JMC emerged from World War II with substantial capital and confidence, the paper argues that the operational adjustments necessitated by interwar protectionism had long-term consequences. The firm’s postwar failure to sustain innovation contributed to its eventual decline and sale in the 1970s. By linking interwar tariff policy to multinational restructuring and postwar stagnation, this case study highlights how economic nationalism shaped both the opportunities and constraints facing globally ambitious family firms in the twentieth century.