Immigration in America: Data and Myths, Revisited With Leah Boustan

Episode Summary

Executive Summary: The episode revisits an economics-based case for immigration using data on both immigrants and their children across historical and modern waves. Leah Bustan argues immigrants generally perform well relative to comparable natives, with outcomes shaped more by geography, selection, and local conditions than by simplistic country-of-origin or race narratives. The discussion also explores why public resistance persists despite positive aggregate effects, emphasizing housing, culture, and political polarization.

Main Topics: Data and methodology for studying immigrant outcomes (Priority: 5/5): Bustan explains how modern data tools—Ancestry census matching historically and IRS tax records today—allow researchers to trace individuals and their children over time, revealing long-term mobility patterns rather than snapshot outcomes. Immigrant success across generations (Priority: 5/5): The central finding is that immigrants and especially their children often do as well as or better than similar U.S.-born households, overturning stereotypes about immigrant underperformance. Country-of-origin variation and gender differences (Priority: 4/5): Outcomes vary substantially by origin and by sex: some groups outperform expectations while others lag, and patterns differ sharply for sons versus daughters, suggesting household and neighborhood dynamics matter. Geography versus culture in explaining outcomes (Priority: 4/5): Historically, geography—especially immigrants avoiding the low-mobility South—explains much of the advantage; today geography matters less, leaving more room for cultural explanations, though evidence remains incomplete. Why anti-immigration sentiment persists (Priority: 5/5): The discussion argues that opposition is not driven mainly by economics alone. Housing costs, crowding, perceived cultural change, crime, legality, and refugee narratives all shape public attitudes. Policy response beyond immigration alone (Priority: 4/5): The speakers suggest that immigration policy should be paired with broader policies, especially more housing supply and responses to local capital needs, to reduce backlash and share gains more widely. Global effects and selection (Priority: 3/5): Immigration may help the U.S. while depriving origin ქვეყნies of skilled, motivated people. This raises broader questions about the global distribution of human capital and institutional reform.

Key Arguments: The ability to follow people over decades using census and tax records has overturned many myths about immigrant assimilation and mobility. Immigrants, and especially their children, do fine on average and often outperform similar natives at comparable income levels. Simple comparisons between immigrants today and immigrants 100 years ago are misleading; the data show many similarities across eras. Country-of-origin differences exist, but they do not map cleanly onto race, language, or politically convenient stereotypes. Historically, geography explains much of the difference in outcomes because immigrants concentrated outside the South, where upward mobility was limited for everyone. Today, geography matters less, so cultural and household practices may explain more of the remaining variation, but evidence is not definitive. Public resistance to immigration may stem less from wages and more from visible local costs like higher rents, crowding, school pressure, and traffic. Political polarization over immigration is driven more by cultural, crime, terrorism, family, persecution, and legality narratives than by labor-market economics. Immigration policy should preserve current flows, modestly expand slots with population growth, and favor high-skill entry without choking off low-skill labor needed in key sectors. Immigration has distributional and possibly negative external effects on origin countries through brain drain and institutional weakening, even if it benefits the U.S.

Data Points: European share of foreign-born U.S. population circa 100 years ago: 90% - Used to contrast older immigration waves with today’s more global immigrant population. Historical immigration wave: 1880 to 1920 - Ellis Island-era migration period discussed as the first major wave studied. Modern immigration wave: recent years - The second major wave analyzed using IRS-based data. Immigrant child outcomes: better than similar natives with the same income distribution - Core finding from the book and discussion. Data source for modern tracking: IRS tax records - Used to follow adults and their children from dependency to adulthood. Data source for historical tracking: Ancestry.com and census records - Used to match individuals across censuses and trace life trajectories. Country-origin data points in the past: around 15 - Approximate number of historical origin groups available for analysis. Country-origin data points today: around 45 - Approximate number of modern origin groups available for analysis. Immigrant households in the income distribution: 25th percentile vs 75th percentile examples - Used to illustrate why uncontrolled comparisons can mislead public perception. India advanced-degree share among immigrants to the U.S.: 70% or 80% (directionally stated) - Mentioned as an example of strong positive selection among Indian immigrants. India advanced-degree share in India: 8% - Used to highlight selection effects and potential brain drain.

Pivotal Quotes: "if there is one bottom line is immigrants do fine. In fact, they do better than similar natives with the same level of income distribution." — Leah Bustan: Summarizing the book’s core empirical conclusion about immigrant and second-generation outcomes. "We have social services for the very rich, rugged individualism for the poor." — Lucia Zingales: Opening line framing the podcast’s broader critique of inequality and capitalism before shifting to immigration. "The relevant question is not, you know, let's start a race with everyone who was raised at the 25th percentile and see how far they get." — Leah Bustan: Explaining why comparisons must focus on immigrants’ effects on U.S.-born workers rather than only on immigrant children’s mobility.

Implications: Listeners should expect immigration debates to hinge less on aggregate economics than on local housing, culture, and political identity. A broader policy package—especially more housing supply—may be needed to sustain immigration support.