Wealthy Nations Gain Major Economic Boost from Immigration: Study.

While immigration remains one of the most polarizing focal points in modern political discourse, hard economic data tells a radically different story. According to a major new research paper, advanced economies that integrated high numbers of foreign-born workers over the past 35 years experienced substantial, long-term surges in macroeconomic productivity and investment.

The groundbreaking study—titled “The immigration impact on population, employment, investment, productivity and prices in OECD countries”—is authored by renowned labor economist Giovanni Peri (Professor at the University of California, Davis) alongside Gaetano Basso (Economist at Banca d’Italia). The findings are slated for high-profile presentation at the upcoming European Central Bank (ECB) Forum on Central Banking in Sintra, Portugal, challenging the core arguments of anti-immigration political factions sweeping through the West.

Quantifying the “Immigration Dividend” on Growth

Professor Peri’s empirical analysis tracks the shifting demographics of the Organisation for Economic Co-operation and Development (OECD) bloc, where the total immigrant population ballooned from 25 million in 1990 to roughly 100 million in 2024.

The data indicates that instead of diluting local labor markets or creating “fading returns,” inflows—especially of highly skilled professionals—act as a major multiplier for business investment and efficiency.

Macroeconomic Impact of a 1% Increase in Immigrant Share
├── Within 5 Years:  +1.2% GDP per Worker Growth
└── Within 10 Years: +1.9% GDP per Worker Growth

The study confirms that these economic windfalls are tightly coupled with strong investment capital growth. As foreign-born talents plug systemic labor gaps, businesses aggressively deploy capital to scale operations, boosting the overarching gross domestic product (GDP) per employee.

Reversing Western Europe’s Demography Crisis

A central pillar of the research focuses on immigration’s role as an economic lifeline against severe domestic demographic decline. Across many wealthy nations—particularly within the European Union—natural population replacement (births minus deaths) turned structurally negative in 2015.

The report isolates specific regional data points to show how migration effectively insulated large economies from shrinking:

• Spain: A 15 percentage point increase in the immigrant demographic share over the analyzed timeline accounted for a massive 28% of the country’s total growth in GDP per worker.
• United Kingdom: A 10 percentage point increase in foreign-born residents was responsible for roughly 19% of the UK’s total per-capita GDP expansion.
• Canada & Australia: The study highlights these two nations as prime examples of economies possessing immense structural absorption capacity, proving that economic benefits persist efficiently even at much higher immigration thresholds.

The Divergence: Data vs. Partisan Rhetoric

The timing of the paper’s release highlights a sharp divide between empirical fiscal reality and current geopolitical shifts. Across the United States, Germany, France, and Great Britain, nationalist and far-right political parties have gained major momentum by framing immigration as an existential threat to domestic wages and public infrastructure.

Peri’s economic modeling directly disputes those assertions. The data shows that by actively expanding the workforce, filling critical high-skill positions, and driving capital investment, immigration provides advanced economies with their most reliable hedge against stagnant productivity and aging populations.