The Hidden Costs of Immigration Restriction: Labor Shortages and Economic Effects After 1924

The National Origins Act of 1924 cut annual immigration from roughly 1.2 million to about 150,000—a 90% reduction. It did so by assigning tiny quotas to Southern and Eastern European nations and near-zero quotas to Asia and Africa, while favoring Northern Europe. The stated goal was cultural and racial preservation. What actually happened was a labor crisis. American farms, factories, and mines suddenly lost the workers they had relied on for decades, and employers had to scramble to find replacements. That scramble—and its failures—rippled through the economy for the next four decades.

Which Industries Felt It First and Worst

Agriculture was hit hardest. Before 1924, immigrants and their children made up the majority of farm labor in California, the Southwest, and other regions. After the quota system kicked in, growers faced chronic shortages. They responded by mechanizing where possible—tractors and harvesters replaced hand labor—but only gradually. Throughout the 1930s and 1940s, they lobbied the federal government for emergency labor programs. Mining and logging faced similar pressures. Textile mills in New England, which had drawn heavily on French-Canadian and Portuguese immigrants, found recruitment tightening. Manufacturing in the Northeast and Midwest, which had absorbed waves of Eastern European workers, also struggled to fill unskilled and semi-skilled positions.

Domestic service and construction also suffered, though less visibly. Women who might have immigrated to work as housemaids or nannies were no longer available in the numbers employers wanted, putting upward pressure on wages for those jobs—one of the few labor sectors where restriction actually raised pay for native workers. Construction, dependent on immigrant laborers for much of its workforce, slowed in some regions and became more expensive.

How Employers and the Government Filled the Gap

Faced with labor scarcity, American employers pursued three overlapping strategies. First, they recruited internally. The Great Depression and Dust Bowl drove millions of rural Americans—including Black sharecroppers and tenant farmers from the South—to migrate northward and westward seeking work. Some moved voluntarily; others were pushed out by mechanization and economic collapse. This internal migration did ease some labor shortages, but it also created new social tensions and competition for jobs within the country.

Second, the government created temporary worker programs. The most famous was the Bracero Program (1942–1964), which allowed Mexican workers to enter the U.S. on fixed-term contracts, primarily for agriculture. Though originally framed as a wartime emergency measure, it became permanent policy and eventually brought in over 4 million worker-years of labor. Braceros were cheaper than native workers, had fewer legal protections, and could be deported if they caused trouble—making them attractive to employers but corrosive to wage standards and working conditions for all agricultural workers.

Third, employers invested in labor-saving technology. Mechanical harvesters, cotton pickers, and other innovations accelerated through the 1940s–1960s, partly because labor was expensive and scarce. This had a paradoxical effect: restriction forced modernization in some sectors, which eventually reduced labor demand altogether. By the 1960s, farms needed fewer workers, not more.

The Wage and Productivity Puzzle

Economic theory suggests that restricting labor supply should raise wages for workers already in the country. The evidence is mixed. In some sectors—notably construction and domestic service—wages for native workers did rise relative to other jobs. But in agriculture, wages stayed artificially low because the Bracero Program and other temporary schemes kept supply high enough to prevent real wage growth. Employers essentially had their cake and ate it too: they faced some labor scarcity, but used government programs and mechanization to avoid paying what a truly tight labor market would have demanded.

Broader economic growth was probably dampened. Economists have estimated that immigration restriction reduced overall productivity growth and GDP expansion by preventing the reallocation of labor to its most productive uses. Immigrants typically fill gaps—taking jobs that native workers avoid or that require rapid scaling—and their absence meant some industries couldn't expand as quickly. This was especially true in the 1940s–1950s, when postwar demand was surging but the labor supply couldn't keep up.

Why This Matters and When It Became Clear

The 1924 Act was meant to protect American workers and preserve national character. Instead, it created labor bottlenecks that lasted decades. The Great Depression masked some of the shortage (unemployment was high), but by the late 1930s and especially after 1941, the squeeze became acute. During World War II, labor scarcity was so severe that the government had to recruit women into factories and create the Bracero Program on an emergency basis. After the war, as the economy boomed and the Baby Boom began, labor demand only grew—yet immigration remained capped at Depression-era levels. By the early 1960s, the contradiction was undeniable: the economy was growing fast, unemployment was low, but immigration quotas were frozen at levels set for a smaller, poorer nation.

This gap between policy and economic reality became a key argument for the Immigration and Nationality Act of 1965, which abolished the national origins quota system. Policymakers, economists, and employers had come to see the 1924 restrictions as an outdated drag on growth. The 1965 reform didn't immediately restore pre-1924 immigration levels, but it opened the door to the higher flows that characterized the late 20th century.

Sources

• Goldin, Claudia. 'The Political Economy of Immigration Restriction in the United States, 1890 to 1921.' In The Regulated Economy: A Historical Approach to Political Economy (1986).
• Orrenius, Pia M., and Madeline Zavodny. 'Does Immigration Affect Wages?' Federal Reserve Bank of Atlanta Economic Review (2015).
• Calavita, Kitty. Inside the State: The Bracero Program, Immigration, and the I.N.S. (1992).
• Hatton, Timothy J., and Jeffrey G. Williamson. 'What Fundamentals Drive World Migration?' NBER Working Paper 9159 (2002).